- Passage: "The octopus is among the most intelligent invertebrates on Earth. It can open jars, solve mazes, and even recognize individual human keepers, abilities once thought to belong only to animals with backbones." What is the main idea of this passage?
- Octopuses are more intelligent than humans
- All sea creatures can open jars
- Octopuses display surprising intelligence for an invertebrate
- Invertebrates rarely interact with people
Correct answer: Octopuses display surprising intelligence for an invertebrate
The main idea is that octopuses display surprising intelligence for an invertebrate. The passage names the octopus as among the most intelligent invertebrates and lists abilities once thought limited to backboned animals. The other choices overstate single details or make claims the passage never supports.
- Passage: "The Sahara Desert was not always a sea of sand. Thousands of years ago, rock paintings show that the region held lakes, grasslands, and herds of grazing animals before a shifting climate dried it out." According to the passage, what evidence shows the Sahara was once green?
- Written diaries from ancient farmers
- Satellite photographs of the region
- Rock paintings of lakes and grazing animals
- Modern weather records
Correct answer: Rock paintings of lakes and grazing animals
According to the passage, rock paintings of lakes and grazing animals show the Sahara was once green. The text states these paintings reveal lakes, grasslands, and herds before the climate dried out. Diaries, satellites, and weather records are not mentioned as evidence.
- Passage: "When the power failed across the entire building, the lab technician immediately moved the temperature-sensitive samples into the backup cooler and started the emergency generator before anyone had to ask." What can the reader most reasonably infer about the technician?
- The technician was unfamiliar with the lab
- The technician ignored the emergency
- The technician had caused the power failure
- The technician acted quickly and took initiative
Correct answer: The technician acted quickly and took initiative
The reader can infer the technician acted quickly and took initiative. Moving samples and starting the generator before being asked shows readiness and self-direction. Nothing suggests unfamiliarity, blame for the outage, or neglect of the emergency.
- Passage: "The mayor's plan to widen the highway was met with skepticism by residents, who doubted that the project would ease the traffic problems she promised to solve." As used in this passage, the word "skepticism" most nearly means:
- Eager support
- Quiet approval
- Total confusion
- Doubt and disbelief
Correct answer: Doubt and disbelief
In context, "skepticism" most nearly means doubt and disbelief. The sentence explains residents doubted the plan would work, signaling distrust of the promise. Eager support or quiet approval would contradict that doubt, and confusion is not what the residents express.
- Passage: "Lightning is far hotter than the surface of the sun. As a bolt tears through the air, it heats the surrounding gas so suddenly that the air expands with explosive force, producing the sound we call thunder." What is the author's main purpose in this passage?
- To warn readers to stay indoors during storms
- To describe the colors of a lightning bolt
- To argue that the sun is cooler than people think
- To explain how lightning produces thunder
Correct answer: To explain how lightning produces thunder
The author's main purpose is to explain how lightning produces thunder. The passage describes lightning heating the air so suddenly that it expands and creates sound. It does not warn readers, compare the sun's overall temperature, or detail colors.
- Passage: "The town council voted to install solar-powered streetlights along the main avenue. Supporters pointed to lower electricity bills, while opponents questioned whether the lights would stay bright through the long, cloudy winters." Which detail is directly stated in the passage?
- The lights failed during the first winter
- The avenue had no streetlights before
- The council rejected the proposal
- Opponents questioned the lights' brightness in cloudy winters
Correct answer: Opponents questioned the lights' brightness in cloudy winters
The directly stated detail is that opponents questioned the lights' brightness in cloudy winters. That concern appears word for word in the passage. The claims about failure, rejection, prior lights, and unanimous support are not stated.
- Passage: "The young pianist had practiced for months, yet as she walked onstage her hands shook and she nearly forgot the opening notes. Once her fingers touched the keys, however, the music came back to her." What can be inferred about the pianist before she began playing?
- She had never practiced the piece
- She wanted to leave the stage permanently
- She disliked playing the piano
- She felt nervous despite her preparation
Correct answer: She felt nervous despite her preparation
It can be inferred that the pianist felt nervous despite her preparation. Shaking hands and nearly forgetting the opening notes after months of practice point to stage nerves rather than lack of skill. The passage contradicts the idea that she never practiced or disliked playing.
- Passage: "The scientist's claims were met with scrutiny from her peers, who carefully examined her data and repeated her experiments before accepting the results." As used here, "scrutiny" most nearly means:
- Open hostility
- Instant agreement
- Close examination
- Polite indifference
Correct answer: Close examination
In context, "scrutiny" most nearly means close examination. The clue that peers carefully examined her data and repeated her experiments describes thorough inspection. Instant agreement, hostility, and indifference all conflict with the careful checking described.
- Passage: "Wind turbines turn the energy of moving air into electricity. As the wind pushes against the angled blades, they spin a shaft connected to a generator, which produces a steady current for homes and businesses." What is the central idea of this passage?
- Wind turbines are dangerous to nearby birds
- Wind turbines are cheaper than solar panels
- Wind turbines only work in coastal regions
- Wind turbines convert moving air into electricity
Correct answer: Wind turbines convert moving air into electricity
The central idea is that wind turbines convert moving air into electricity. Both sentences explain how wind spins the blades and generator to make current. The other options introduce claims about birds, locations, and cost that the passage never makes.
- Passage: "The empty playground at dusk seemed to hold its breath. Swings drifted with no riders, a forgotten ball rested in the grass, and the silence pressed in where laughter had once rung out." What is the most likely reason the author describes the playground this way?
- To advertise a new park opening
- To explain the rules of a playground game
- To create a mood of loneliness and quiet
- To celebrate a busy afternoon of play
Correct answer: To create a mood of loneliness and quiet
The author most likely describes the playground to create a mood of loneliness and quiet. Images of empty swings, a forgotten ball, and pressing silence replace the memory of laughter with stillness. The passage neither advertises, instructs, nor celebrates activity.
- Passage: "In the nineteenth century, lighthouse keepers lived isolated lives, often on rocky islands far from town. They kept the lamp burning every night, recorded the weather, and rescued sailors when ships ran aground nearby." According to the passage, what was one duty of nineteenth-century lighthouse keepers?
- Delivering mail to nearby towns
- Building new ships for sailors
- Recording the weather each day
- Teaching children in island schools
Correct answer: Recording the weather each day
According to the passage, one duty of lighthouse keepers was recording the weather. The text lists keeping the lamp burning, recording the weather, and rescuing sailors as their tasks. Delivering mail, building ships, and teaching are not mentioned.
- Passage: "The grocery store advertised that its produce was locally grown, yet the stickers on the apples listed a country thousands of miles away." What conclusion does the passage most strongly suggest?
- The stickers were placed by customers
- The apples were grown in the store
- The store's claim may be misleading
- The store sold only local produce
Correct answer: The store's claim may be misleading
The passage most strongly suggests the store's claim may be misleading. Advertising local produce while the stickers list a distant country creates a contradiction that undercuts the claim. The other options ignore the conflict or invent details the passage does not provide.
- Passage: "After weeks of negotiation, the two nations reached an amicable agreement, shaking hands and pledging to cooperate on trade in the years ahead." As used in this passage, "amicable" most nearly means:
- Hostile and tense
- Brief and temporary
- Secret and hidden
- Friendly and agreeable
Correct answer: Friendly and agreeable
In context, "amicable" most nearly means friendly and agreeable. Shaking hands and pledging cooperation describe a warm, cooperative outcome. Hostility would be the opposite, and the passage gives no sign the agreement was secret or merely temporary.
- Passage: "The printing press, introduced in Europe in the fifteenth century, made it possible to produce books quickly and cheaply. Before its invention, each book had to be copied by hand, a slow process that kept reading material rare and costly." What is the main point of this passage?
- Few people in Europe wanted to read
- Hand-copied books were more accurate than printed ones
- The printing press made books faster and cheaper to produce
- The printing press was invented in Asia
Correct answer: The printing press made books faster and cheaper to produce
The main point is that the printing press made books faster and cheaper to produce. The passage contrasts slow hand-copying with the quick, inexpensive printing the press allowed. The other choices contradict the text or add claims it does not make.
- Passage: "The supervisor offered only terse replies during the interview, answering each question with a single word and volunteering nothing more." As used here, "terse" most nearly means:
- Brief and to the point
- Long and detailed
- Warm and chatty
- Loud and angry
Correct answer: Brief and to the point
In context, "terse" most nearly means brief and to the point. Answering with a single word and volunteering nothing describes very short replies. Long, chatty, or angry responses would all conflict with the spare answers described.
- Passage: "Bamboo is one of the fastest-growing plants in the world. Some species can grow nearly a meter in a single day, and because it regrows so quickly after harvest, it is considered a renewable building material." Which statement is directly supported by the passage?
- Bamboo grows quickly and regrows after harvest
- Bamboo takes decades to reach full size
- Bamboo cannot be used in construction
- Bamboo grows only in cold climates
Correct answer: Bamboo grows quickly and regrows after harvest
The passage directly supports that bamboo grows quickly and regrows after harvest. It states some species grow nearly a meter a day and regrow rapidly, making it renewable. The other options contradict the speed, building use, and renewability the passage describes.
- Passage: "As the floodwaters rose past the porch steps, the family hurried to carry their photo albums and important papers to the attic, glancing nervously out the windows." What can the reader infer about the family's situation?
- They were preparing for a celebration
- They felt safe and unhurried
- They were worried about the rising water threatening their home
- They were leaving on a planned vacation
Correct answer: They were worried about the rising water threatening their home
The reader can infer the family was worried about the rising water threatening their home. Rushing valuables to the attic and glancing nervously at the windows signal alarm about the flood. These cues rule out a celebration, calm, or a planned trip.
- Passage: "Coral bleaching occurs when ocean water becomes too warm. The stressed coral expels the tiny algae that live inside it and give it color, leaving the coral pale and far more likely to die." What is the author's primary purpose?
- To explain what causes coral bleaching and why it matters
- To argue that coral is more colorful than fish
- To describe how to start a saltwater aquarium
- To list the names of tropical fish species
Correct answer: To explain what causes coral bleaching and why it matters
The author's primary purpose is to explain what causes coral bleaching and why it matters. The passage describes warm water stressing coral, the loss of algae, and the resulting risk of death. It does not compare colors, give aquarium tips, or list fish species.
- Passage: "The hospital introduced a new electronic record system. At first, nurses complained that it slowed them down, but within a few weeks most agreed it saved time and reduced errors." What can be concluded about the new system over time?
- It was abandoned after a few weeks
- Nurses never used it at all
- It increased errors permanently
- It came to be seen as helpful despite early complaints
Correct answer: It came to be seen as helpful despite early complaints
It can be concluded that the system came to be seen as helpful despite early complaints. The passage notes initial complaints that gave way to agreement that it saved time and reduced errors. The other options contradict the eventual acceptance the passage describes.
- Passage: "The Wright brothers achieved the first powered flight in 1903, but their aircraft stayed aloft for only twelve seconds. From that brief moment grew an industry that would one day carry millions of passengers across oceans." According to the passage, how long did the first powered flight last?
- A full minute
- Several hours
- Twelve seconds
- One entire day
Correct answer: Twelve seconds
According to the passage, the first powered flight lasted twelve seconds. The text states the aircraft stayed aloft for only twelve seconds. A minute, several hours, and a full day all contradict the stated duration.
- Passage: "The novelist was known for her prolific output, publishing two or three books every year for nearly three decades." As used in this passage, "prolific" most nearly means:
- Producing little work
- Refusing to publish
- Working only in secret
- Producing a great deal of work
Correct answer: Producing a great deal of work
In context, "prolific" most nearly means producing a great deal of work. Publishing two or three books a year for decades describes an enormous, steady output. Producing little, working secretly, or refusing to publish would all contradict that abundance.
- Passage: "People once believed that the heart, not the brain, was the center of thought and emotion. Only through centuries of careful study did scientists come to understand the brain's true role." What is the main idea of this passage?
- The heart controls human thought
- Early scientists ignored the brain entirely
- Emotions have no connection to the body
- Understanding the brain's role took centuries of study
Correct answer: Understanding the brain's role took centuries of study
The main idea is that understanding the brain's role took centuries of study. The passage describes an old belief about the heart and the long process by which scientists learned the brain's function. The other choices repeat the old belief or overstate claims the passage does not make.
- Passage: "The trail guide warned the group to stay on the marked path. Just beyond the ropes, she explained, the cliff edge was hidden by thick brush, and the rock could crumble without warning." Why does the guide warn the group to stay on the path?
- Because the hidden cliff edge and crumbling rock are dangerous
- Because the path is the fastest way back
- Because photographs are not allowed off the trail
- Because the brush contains rare flowers
Correct answer: Because the hidden cliff edge and crumbling rock are dangerous
The guide warns the group because the hidden cliff edge and crumbling rock are dangerous. The passage explains that brush conceals the cliff edge and the rock could give way without warning. Speed, photo rules, and rare flowers are not mentioned as reasons.
- Passage: "The committee praised the proposal for being concise, noting that it conveyed every necessary point in just two pages without a single wasted word." As used here, "concise" most nearly means:
- Brief and clear
- Long and repetitive
- Vague and unclear
- Decorated and fancy
Correct answer: Brief and clear
In context, "concise" most nearly means brief and clear. The clue that it covered every point in two pages without wasted words points to compact, efficient writing. Length and repetition would be the opposite, and vagueness or decoration do not match the praise given.
- Passage: "Antarctica holds about seventy percent of the world's fresh water, locked away in a massive ice sheet. Despite all this water, the continent is technically a desert, because almost no precipitation falls there each year." Which detail is directly stated in the passage?
- Antarctica is the warmest continent
- Antarctica receives heavy rainfall yearly
- Antarctica holds about seventy percent of the world's fresh water
- Antarctica has no ice at all
Correct answer: Antarctica holds about seventy percent of the world's fresh water
The directly stated detail is that Antarctica holds about seventy percent of the world's fresh water. That figure appears in the passage along with the note that little precipitation falls. The claims about warmth, heavy rainfall, and no ice all contradict the text.
- Passage: "The customer studied the contract for a long time, asked the salesman several pointed questions, and finally set down the pen without signing." What can the reader infer about the customer's decision?
- The customer signed eagerly
- The customer was thrilled with the deal
- The customer never read the contract
- The customer chose not to commit yet
Correct answer: The customer chose not to commit yet
The reader can infer the customer chose not to commit yet. Studying the contract carefully, asking pointed questions, and setting down the pen without signing all indicate hesitation. These cues contradict eager signing, ignoring the contract, or being thrilled.
- Passage: "Sleep is essential for memory. While we rest, the brain replays and strengthens the connections formed during the day, helping us hold on to what we have learned." What is the author's main purpose in this passage?
- To explain how sleep helps strengthen memory
- To argue that people sleep too much
- To describe different kinds of dreams
- To list the stages of a sleep cycle
Correct answer: To explain how sleep helps strengthen memory
The author's main purpose is to explain how sleep helps strengthen memory. The passage describes the brain replaying and reinforcing connections during rest to retain learning. It does not argue about sleeping too much, describe dreams, or list sleep stages.
- Passage: "In ancient Egypt, the yearly flooding of the Nile spread rich silt across the fields. This natural fertilizer allowed farmers to grow abundant crops and made the region one of the most productive in the ancient world." According to the passage, why was the flooding of the Nile beneficial?
- It cooled the desert air
- It washed away dangerous insects
- It allowed ships to sail upstream
- It spread rich silt that fertilized the fields
Correct answer: It spread rich silt that fertilized the fields
According to the passage, the flooding was beneficial because it spread rich silt that fertilized the fields. The text states this natural fertilizer let farmers grow abundant crops. Cooling air, helping ships, and removing insects are not mentioned.
- Passage: "The reviewer called the film tedious, complaining that its three-hour runtime dragged through scene after scene in which almost nothing happened." As used in this passage, "tedious" most nearly means:
- Thrilling and fast-paced
- Funny and clever
- Short and snappy
- Long and tiresome
Correct answer: Long and tiresome
In context, "tedious" most nearly means long and tiresome. The complaint about a three-hour runtime that dragged with little happening points to boredom. Thrilling, short, or funny would all contradict the reviewer's negative description.
- Passage: "Two writers describe the same mountain town. The first paints it as a peaceful escape from busy city life, while the second portrays it as dull and isolated, with little to do." How do the two writers' views compare?
- Both writers find the town exciting
- The writers offer opposing impressions of the same town
- Both writers dislike the town equally
- The writers describe two different towns
Correct answer: The writers offer opposing impressions of the same town
The two writers offer opposing impressions of the same town. The first sees it as a peaceful escape, while the second sees it as dull and isolated. They do not both find it exciting or both dislike it, and they describe the same town, not two.
- Passage: "The volcano had been dormant for centuries, and the village built at its base assumed it would never wake. When it suddenly rumbled to life, residents had little time to flee." As used here, "dormant" most nearly means:
- Erupting violently
- Recently formed
- Inactive for a time
- Completely destroyed
Correct answer: Inactive for a time
In context, "dormant" most nearly means inactive for a time. The phrase "for centuries" and the later rumbling to life show the volcano had been quiet before becoming active. Erupting violently would be the opposite, and the passage does not say it was newly formed or destroyed.
- Passage: "Honey never spoils. Archaeologists have found pots of honey in ancient Egyptian tombs that, after thousands of years, are still perfectly edible, thanks to honey's low moisture and natural acidity." What is the main idea of this passage?
- Honey spoils quickly in warm climates
- Honey can last thousands of years without spoiling
- Egyptian tombs were used to store food
- Honey is the oldest food ever made
Correct answer: Honey can last thousands of years without spoiling
The main idea is that honey can last thousands of years without spoiling. The passage states honey found in ancient tombs is still edible because of its low moisture and acidity. The other choices contradict the text or add claims it does not make.
- Passage: "The patient described his symptoms in a halting voice, pausing often, repeating himself, and struggling to find the right words." What can be inferred about the patient as he spoke?
- He found it difficult to communicate clearly
- He was eager to leave the appointment
- He was angry at the doctor
- He had no symptoms to report
Correct answer: He found it difficult to communicate clearly
It can be inferred that the patient found it difficult to communicate clearly. Pausing often, repeating himself, and struggling for words all show trouble expressing his symptoms. The passage gives no sign of eagerness to leave, anger, or an absence of symptoms.
- Passage: "The new safety regulations were comprehensive, covering everything from equipment inspections and emergency drills to the proper storage of every chemical in the building." As used here, "comprehensive" most nearly means:
- Complete and thorough
- Confusing and unclear
- Optional and ignored
- Brief and limited
Correct answer: Complete and thorough
In context, "comprehensive" most nearly means complete and thorough. Covering everything from inspections to drills to chemical storage describes rules that leave little out. Brief and limited would be the opposite, and the passage does not call them confusing or optional.
- Passage: "The Great Migration of the early twentieth century saw millions of African Americans move from the rural South to cities in the North and West in search of jobs and an escape from harsh discrimination." According to the passage, why did people take part in the Great Migration?
- To return to farming in the South
- To seek jobs and escape discrimination
- To avoid the cold northern winters
- To explore newly discovered lands
Correct answer: To seek jobs and escape discrimination
According to the passage, people took part in the Great Migration to seek jobs and escape discrimination. The text directly names work and escape from harsh discrimination as their motives. Returning to farming, avoiding winters, and exploring new lands are not mentioned.
- Passage: "The professor opened the lecture with a puzzling riddle, paused while students whispered guesses, and only then revealed that the answer would unlock the entire topic of the day." Why does the professor most likely begin with a riddle?
- To waste class time
- To confuse the students permanently
- To capture interest before introducing the day's topic
- To prove the topic is too hard to learn
Correct answer: To capture interest before introducing the day's topic
The professor most likely begins with a riddle to capture interest before introducing the day's topic. A puzzle invites students to think and links directly to the lesson the answer unlocks. The passage does not suggest wasting time, lasting confusion, or that the topic is unlearnable.
- Passage: "A keystone species is one whose presence holds an entire ecosystem together. Remove it, and the whole web of life can unravel, as other species lose the balance the keystone once provided." Which of the following best states the main idea?
- Keystone species are the largest animals in any ecosystem
- A keystone species is vital to holding an ecosystem in balance
- Ecosystems do not depend on any single species
- Removing any species improves an ecosystem
Correct answer: A keystone species is vital to holding an ecosystem in balance
The best statement of the main idea is that a keystone species is vital to holding an ecosystem in balance. The passage defines such a species and explains that removing it can unravel the web of life. The other choices contradict the passage or misstate the definition.
- Passage: "The intern arrived an hour early, organized the supply room without being asked, and stayed late to finish labeling the samples, all in her first week on the job." What can be inferred about the intern?
- She was uninterested in the work
- She was dedicated and eager to contribute
- She frequently arrived late
- She avoided difficult tasks
Correct answer: She was dedicated and eager to contribute
It can be inferred that the intern was dedicated and eager to contribute. Arriving early, organizing without being asked, and staying late in her first week all show strong commitment. These details contradict disinterest, lateness, or avoiding tasks.
- Passage: "The senator's speech was filled with vague promises that sounded appealing but never explained how any of his goals would actually be achieved." As used in this passage, "vague" most nearly means:
- Precise and detailed
- Unclear and lacking specifics
- Hostile and threatening
- Short and rushed
Correct answer: Unclear and lacking specifics
In context, "vague" most nearly means unclear and lacking specifics. The clue that the promises never explained how goals would be achieved points to a lack of detail. Precise would be the opposite, and the passage does not describe the speech as hostile or rushed.
- Passage: "Spiders are not insects, though the two are often confused. Spiders have eight legs and two main body parts, while insects have six legs and three body parts, along with antennae that spiders lack." Which detail is directly stated in the passage?
- Spiders have eight legs and two main body parts
- Spiders and insects both have antennae
- Insects have eight legs
- Spiders are a type of insect
Correct answer: Spiders have eight legs and two main body parts
The directly stated detail is that spiders have eight legs and two main body parts. The passage gives these exact features for spiders. The claims that both have antennae, that insects have eight legs, or that spiders are insects all contradict the text.
- Passage: "After the long drought finally broke, the farmer stood at the edge of his field, watching the rain soak the cracked earth, and let out a slow, grateful breath." What can be inferred about the farmer's feelings?
- He was frustrated by the rain
- He felt relief that the drought had ended
- He was indifferent to the weather
- He wished the drought would continue
Correct answer: He felt relief that the drought had ended
It can be inferred that the farmer felt relief that the drought had ended. Watching the rain soak the cracked earth and letting out a slow, grateful breath both signal relief. Frustration, indifference, and wishing for more drought all contradict these cues.
- Passage: "Many medicines come from plants. The bark of the willow tree, for example, contains a compound related to aspirin, and people used it to ease pain and fever long before modern chemistry could explain why it worked." What is the author's main purpose in this passage?
- To warn readers against eating tree bark
- To explain that some medicines originate from plants
- To argue that modern medicine is unnecessary
- To describe how willow trees grow
Correct answer: To explain that some medicines originate from plants
The author's main purpose is to explain that some medicines originate from plants. The passage uses willow bark and aspirin as an example of a plant-based remedy used before chemistry explained it. It does not warn against eating bark, dismiss modern medicine, or describe tree growth.
- Passage: "The negotiator remained tactful throughout the heated meeting, choosing her words with care so that no one left feeling insulted." As used here, "tactful" most nearly means:
- Sensitive and considerate in speech
- Rude and careless
- Silent and withdrawn
- Loud and aggressive
Correct answer: Sensitive and considerate in speech
In context, "tactful" most nearly means sensitive and considerate in speech. Choosing words carefully so no one felt insulted describes thoughtful, diplomatic communication. Rudeness, silence, and aggression all conflict with that careful consideration.
- Passage: "Recycling one aluminum can saves enough energy to power a television for several hours. Yet many cans still end up in landfills, where the metal can take centuries to break down." What is the main idea of this passage?
- Aluminum cans break down within a few days
- Recycling aluminum saves energy, but many cans are still wasted
- Televisions should not use electricity
- Landfills are the best place for metal
Correct answer: Recycling aluminum saves energy, but many cans are still wasted
The main idea is that recycling aluminum saves energy, but many cans are still wasted. The passage contrasts the energy saved by recycling with the cans that end up in landfills for centuries. The other choices contradict the text or distort its point.
- Passage: "The detective laid out the timeline carefully: the suspect claimed to be at home all evening, but a parking receipt placed his car downtown at the exact hour of the crime." What conclusion does the passage most strongly suggest?
- The suspect's alibi may be false
- The detective lost the receipt
- The suspect was definitely at home
- The crime never actually happened
Correct answer: The suspect's alibi may be false
The passage most strongly suggests the suspect's alibi may be false. A parking receipt placing his car downtown contradicts his claim of being home all evening. The other options ignore the contradiction or assert details the passage does not support.
- Passage: "The fledgling company grew rapidly in its first year, doubling its staff and opening offices in three new cities." As used in this passage, "fledgling" most nearly means:
- Newly established
- Long-established and old
- Failing and shrinking
- Secretive and hidden
Correct answer: Newly established
In context, "fledgling" most nearly means newly established. The phrase "in its first year" signals a young, new company that is just starting to grow. Old, failing, or secretive would each contradict the description of rapid early growth.
- Passage: "The ancient Olympic Games, held in Greece, were more than athletic contests. They were tied to religious festivals honoring the gods, and during the games, warring city-states agreed to a truce so that athletes could travel safely." Which detail is directly stated in the passage?
- Women competed alongside men in every event
- Warring city-states agreed to a truce during the games
- The games were held in ancient Rome
- The games lasted an entire year
Correct answer: Warring city-states agreed to a truce during the games
The directly stated detail is that warring city-states agreed to a truce during the games. The passage explains this truce let athletes travel safely. The claims about women competing, a Roman location, and a year-long event are not stated.
- Passage: "The article begins by describing the smell of fresh bread drifting from a small bakery, then moves into a discussion of how family-run shops are struggling to survive." Why does the author most likely open with the smell of fresh bread?
- To explain a recipe for baking bread
- To prove that bakeries always succeed
- To draw readers in with a warm image before raising a serious concern
- To argue that bread should cost less
Correct answer: To draw readers in with a warm image before raising a serious concern
The author most likely opens with the smell of fresh bread to draw readers in with a warm image before raising a serious concern. The inviting detail sets a scene that makes the following discussion of struggling shops more vivid. The passage does not give a recipe, claim bakeries always succeed, or argue about price.
- Passage: "The volunteers worked with remarkable diligence, but the project's success was uncertain because funding remained scarce and the deadline was fast approaching." As used in this passage, "scarce" most nearly means:
- In short supply
- More than enough
- Easily replaced
- Wisely spent
Correct answer: In short supply
In context, "scarce" most nearly means in short supply. Funding being scarce, paired with an uncertain outcome and a looming deadline, signals there was not enough money. More than enough would be the opposite, and being easily replaced or wisely spent does not fit the worry described.
- Passage: "Deep beneath the ocean's surface, hydrothermal vents release mineral-rich water heated by the Earth's interior. Around these vents, entire communities of creatures thrive in total darkness, drawing energy from chemicals rather than sunlight." What is the central idea of this passage?
- Sunlight reaches the deep-sea vents
- Life flourishes around deep-sea vents using chemical energy
- All ocean life depends on warm surface water
- Hydrothermal vents are found only near the shore
Correct answer: Life flourishes around deep-sea vents using chemical energy
The central idea is that life flourishes around deep-sea vents using chemical energy. The passage describes communities thriving in darkness by drawing energy from chemicals rather than sunlight. The other options contradict the darkness, the chemical energy source, or the deep location described.
- Passage: "The coach's pep talk was meant to bolster the team's spirits before the championship game, reminding them of how far they had come and how hard they had earned their place." As used in this passage, "bolster" most nearly means:
- To weaken or undermine
- To strengthen and support
- To delay or postpone
- To question and doubt
Correct answer: To strengthen and support
In context, "bolster" most nearly means to strengthen and support. The pep talk was meant to lift the team's spirits by reminding them of their progress and effort. Weakening would be the opposite, and delaying or doubting does not match the encouraging purpose described.
- Evaluate the expression: 6 + 3 × 4 - 2.
Correct answer: 16
The value is 16. Using order of operations, multiplication comes before addition and subtraction, so 3 × 4 = 12 first, giving 6 + 12 - 2. Then add and subtract left to right: 6 + 12 = 18, and 18 - 2 = 16.
- Evaluate: 2 + (5 - 3)² × 3.
Correct answer: 14
The value is 14. Parentheses first give 5 - 3 = 2, then the exponent makes 2² = 4. Next multiply: 4 × 3 = 12. Finally add: 2 + 12 = 14.
- What is the value of 24 ÷ 6 + 2 × 5?
Correct answer: 14
The value is 14. Division and multiplication are done before addition and have equal priority, so 24 ÷ 6 = 4 and 2 × 5 = 10. Adding the results gives 4 + 10 = 14.
- Evaluate: 40 - 12 ÷ (2 + 1) × 2.
Correct answer: 32
The value is 32. The parentheses give 2 + 1 = 3 first. Division and multiplication go left to right: 12 ÷ 3 = 4, then 4 × 2 = 8. Finally 40 - 8 = 32.
- Evaluate: 100 ÷ (4 + 6) + 3².
Correct answer: 19
The value is 19. Parentheses give 4 + 6 = 10 and the exponent gives 3² = 9. Then divide: 100 ÷ 10 = 10, and finally add: 10 + 9 = 19.
- Convert the fraction 3/4 to a decimal.
Correct answer: 0.75
The fraction 3/4 equals 0.75. To convert a fraction to a decimal, divide the numerator by the denominator: 3 ÷ 4 equals 0.75.
- What is 0.6 written as a fraction in lowest terms?
Correct answer: 3/5
The decimal 0.6 equals 3/5. Six tenths is written 6/10, and dividing both the numerator and denominator by their common factor of 2 reduces it to 3/5.
- Express 45% as a decimal.
Correct answer: 0.45
The percent 45% equals the decimal 0.45. To convert a percent to a decimal, divide by 100 or move the decimal point two places to the left, turning 45% into 0.45.
- What is 1/8 expressed as a percentage?
Correct answer: 12.5%
The fraction 1/8 equals 12.5%. Dividing 1 by 8 gives the decimal 0.125, and multiplying by 100 converts it to 12.5%.
- Convert 0.125 to a fraction in lowest terms.
Correct answer: 1/8
The decimal 0.125 equals 1/8. The digits represent 125 thousandths, written 125/1000, and dividing both numbers by their common factor of 125 reduces the fraction to 1/8.
- Which list shows 0.7, 3/4, and 72% ordered from least to greatest?
- 3/4, 0.7, 72%
- 0.7, 72%, 3/4
- 72%, 0.7, 3/4
- 0.7, 3/4, 72%
Correct answer: 0.7, 72%, 3/4
The correct order from least to greatest is 0.7, 72%, 3/4. Converting all to decimals gives 0.7, 0.72, and 0.75, so 0.7 is smallest, 72% is in the middle, and 3/4 is largest.
- A solution is mixed using a ratio of 2 parts concentrate to 5 parts water. If 10 parts of concentrate are used, how many parts of water are needed?
Correct answer: 25
The mixture needs 25 parts of water. The ratio 2 to 5 means water is 2.5 times the concentrate, and scaling the ratio so concentrate becomes 10 (multiplying by 5) makes water 5 × 5 = 25 parts.
- Solve the proportion: 3/4 = x/20.
Correct answer: 15
The value of x is 15. Cross-multiplying the proportion gives 4 × x = 3 × 20 , so 4x = 60, and dividing both sides by 4 gives x = 15.
- In a class, the ratio of students to instructors is 18 to 1. If there are 5 instructors, how many students are there?
Correct answer: 90
There are 90 students. With a ratio of 18 students per instructor, multiplying 18 by the 5 instructors gives 18 × 5 = 90 students.
- A recipe uses flour and sugar in a ratio of 3 to 1. If 12 cups of flour are used, how much sugar is needed?
- 4 cups
- 9 cups
- 36 cups
- 3 cups
Correct answer: 4 cups
The recipe needs 4 cups of sugar. The ratio 3 to 1 means there is one-third as much sugar as flour, so dividing 12 cups of flour by 3 gives 4 cups of sugar.
- If 4 pounds of apples cost $6, what is the cost of 10 pounds at the same rate?
Correct answer: $15
Ten pounds cost \$15. Setting up the proportion 4 pounds is to $6 as 10 pounds is to x, cross-multiplying gives 4x = 60, so x = 15 dollars.
- A map uses a scale where 1 inch represents 25 miles. If two cities are 7 inches apart on the map, how far apart are they in reality?
- 32 miles
- 175 miles
- 150 miles
- 125 miles
Correct answer: 175 miles
The cities are 175 miles apart. Each inch represents 25 miles, so multiplying 7 inches by 25 miles per inch gives 7 × 25 = 175 miles.
- What is 30% of 80?
Correct answer: 24
Thirty percent of 80 is 24. Converting 30% to the decimal 0.30 and multiplying by 80 gives 0.30 × 80 = 24.
- A shirt originally priced at $40 is marked down by 25%. What is the sale price?
Correct answer: $30
The sale price is \$30. A 25% markdown of $40 is 0.25 × 40 = \$10 off, and subtracting that discount from the original price gives 40 - 10 = \$30.
- A student answered 51 out of 60 questions correctly. What percentage did the student answer correctly?
Correct answer: 85%
The student scored 85%. Dividing the 51 correct answers by the 60 total questions gives 0.85, and multiplying by 100 converts it to 85%.
- If 15 is 20% of a number, what is the number?
Correct answer: 75
The number is 75. Since 15 represents 20% of the whole, dividing 15 by the decimal 0.20 gives 15 ÷ 0.20 = 75.
- A hospital ward had 200 patients last month and 230 this month. What is the percent increase in patients?
Correct answer: 15%
The increase is 15%. The change is 230 - 200 = 30 patients, and dividing the 30-patient increase by the original 200 gives 0.15, or 15%.
- A bill of $50 includes an 18% tip. How much is the tip?
Correct answer: $9
The tip is \$9. Converting 18% to the decimal 0.18 and multiplying by the $50 bill gives 0.18 × 50 = \$9.
- Solve for x: 3x + 7 = 22.
Correct answer: 5
The value of x is 5. Subtracting 7 from both sides gives 3x = 15, and dividing both sides by 3 gives x = 5.
- Solve for x: x/4 = 9.
Correct answer: 36
The value of x is 36. To undo division by 4, multiply both sides of the equation by 4, giving x = 9 × 4 = 36.
- Solve for y: 5y - 8 = 2y + 7.
Correct answer: 5
The value of y is 5. Subtracting 2y from both sides gives 3y - 8 = 7, then adding 8 gives 3y = 15, and dividing by 3 gives y = 5.
- Solve for x: 2(x + 3) = 16.
Correct answer: 5
The value of x is 5. Dividing both sides by 2 gives x + 3 = 8, and subtracting 3 from both sides gives x = 5.
- Solve for x: 12 - 4x = -8.
Correct answer: 5
The value of x is 5. Subtracting 12 from both sides gives -4x = -20, and dividing both sides by -4 gives x = 5.
- Solve for n: n/3 + 4 = 10.
Correct answer: 18
The value of n is 18. Subtracting 4 from both sides gives n/3 = 6, and multiplying both sides by 3 gives n = 18.
- How many milligrams are in 2.5 grams?
- 25 mg
- 250 mg
- 2,500 mg
- 0.0025 mg
Correct answer: 2,500 mg
There are 2,500 milligrams in 2.5 grams. Since 1 gram equals 1,000 milligrams, multiplying 2.5 grams by 1,000 gives 2,500 milligrams.
- Convert 4 liters to milliliters.
- 400 mL
- 40 mL
- 0.004 mL
- 4,000 mL
Correct answer: 4,000 mL
Four liters equals 4,000 milliliters. Because 1 liter contains 1,000 milliliters, multiplying 4 liters by 1,000 gives 4,000 milliliters.
- How many centimeters are in 3 meters?
- 30 cm
- 3,000 cm
- 0.03 cm
- 300 cm
Correct answer: 300 cm
Three meters equals 300 centimeters. Since 1 meter equals 100 centimeters, multiplying 3 meters by 100 gives 300 centimeters.
- Convert 500 milligrams to grams.
Correct answer: 0.5 g
Five hundred milligrams equals 0.5 grams. Because 1,000 milligrams make 1 gram, dividing 500 by 1,000 gives 0.5 grams.
- A patient is to receive 0.75 liters of fluid. How many milliliters is this?
- 75 mL
- 7.5 mL
- 750 mL
- 7,500 mL
Correct answer: 750 mL
The patient receives 750 milliliters. Since 1 liter equals 1,000 milliliters, multiplying 0.75 liters by 1,000 gives 750 milliliters.
- How many kilograms are in 4,500 grams?
Correct answer: 4.5 kg
There are 4.5 kilograms in 4,500 grams. Because 1 kilogram equals 1,000 grams, dividing 4,500 grams by 1,000 gives 4.5 kilograms.
- Convert 250 milliliters to liters.
Correct answer: 0.25 L
Two hundred fifty milliliters equals 0.25 liters. Since 1,000 milliliters make 1 liter, dividing 250 by 1,000 gives 0.25 liters.
- Using the formula F = 9/5C + 32, convert 35 degrees Celsius to Fahrenheit.
- 67 degrees F
- 95 degrees F
- 63 degrees F
- 99 degrees F
Correct answer: 95 degrees F
Thirty-five degrees Celsius equals 95 degrees Fahrenheit. Multiplying 35 by 9/5 gives 63, and adding 32 gives 63 + 32 = 95 degrees Fahrenheit.
- Using F = 9/5C + 32, what is 100 degrees Celsius in Fahrenheit?
- 180 degrees F
- 132 degrees F
- 212 degrees F
- 200 degrees F
Correct answer: 212 degrees F
One hundred degrees Celsius equals 212 degrees Fahrenheit. Multiplying 100 by 9/5 gives 180, and adding 32 gives 180 + 32 = 212 degrees Fahrenheit, the boiling point of water.
- Using C = 5/9(F - 32), convert 50 degrees Fahrenheit to Celsius.
- 10 degrees C
- 18 degrees C
- 122 degrees C
- 28 degrees C
Correct answer: 10 degrees C
Fifty degrees Fahrenheit equals 10 degrees Celsius. Subtracting 32 from 50 gives 18, and multiplying 18 by 5/9 gives 10 degrees Celsius.
- A patient's temperature reads 37 degrees Celsius. Using F = 9/5C + 32, what is this in Fahrenheit?
- 96.8 degrees F
- 100.4 degrees F
- 98.6 degrees F
- 94.2 degrees F
Correct answer: 98.6 degrees F
Thirty-seven degrees Celsius equals 98.6 degrees Fahrenheit. Multiplying 37 by 9/5 gives 66.6, and adding 32 gives 66.6 + 32 = 98.6 degrees Fahrenheit, normal body temperature.
- A medication order is for 500 mg, and tablets are available in 250 mg each. How many tablets should be given?
- 2 tablets
- 1 tablet
- 5 tablets
- 0.5 tablet
Correct answer: 2 tablets
Two tablets should be given. Dividing the ordered dose of 500 mg by the 250 mg available in each tablet gives 500 ÷ 250 = 2 tablets.
- A drug is supplied as 100 mg per 5 mL. How many milliliters are needed to give a 40 mg dose?
Correct answer: 2 mL
Two milliliters are needed. The concentration is 100 mg per 5 mL, so setting up the proportion 100 mg is to 5 mL as 40 mg is to x gives 100x = 200, and x = 2 mL.
- An order calls for 0.25 mg of a drug, and the tablets are 0.125 mg each. How many tablets are needed?
- 1 tablet
- 4 tablets
- 2 tablets
- 0.5 tablet
Correct answer: 2 tablets
Two tablets are needed. Dividing the ordered dose of 0.25 mg by the 0.125 mg in each tablet gives 0.25 ÷ 0.125 = 2 tablets.
- A medication is ordered at 5 mg per kilogram of body weight for a patient weighing 60 kg. What is the total dose?
Correct answer: 300 mg
The total dose is 300 mg. Multiplying the ordered 5 mg per kilogram by the patient's 60 kg body weight gives 5 × 60 = 300 mg.
- A liquid medication contains 250 mg per 10 mL. How many milligrams are in 4 mL?
Correct answer: 100 mg
There are 100 mg in 4 mL. The concentration is 250 mg per 10 mL, which is 25 mg per mL, so multiplying 25 mg by 4 mL gives 100 mg.
- A table shows test scores: Monday 80, Tuesday 90, Wednesday 70, Thursday 100. What is the average score for the four days?
Correct answer: 85
The average is 85. Adding the four scores gives 80 + 90 + 70 + 100 = 340, and dividing the total by the 4 days gives 340 ÷ 4 = 85.
- A pie chart shows a hospital budget: 40% staffing, 25% supplies, 20% equipment, 15% other. If the total budget is $200,000, how much is allotted to supplies?
- $80,000
- $50,000
- $40,000
- $25,000
Correct answer: $50,000
Supplies receive \$50,000. Supplies make up 25% of the budget, so multiplying the decimal 0.25 by the $200,000 total gives 0.25 × 200,000 = \$50,000.
- A table lists patient counts by unit: ICU 12, Pediatrics 18, Surgery 30, Maternity 20. What fraction of the total patients are in Surgery?
Correct answer: 3/8
Surgery holds 3/8 of the patients. The total is 12 + 18 + 30 + 20 = 80 patients, and 30 of those are in Surgery, so the fraction is 30/80, which reduces to 3/8.
- The sum of a number and 12 is 30. Which equation represents this statement?
- 12x = 30
- X - 12 = 30
- X + 12 = 30
- 30 + x = 12
Correct answer: X + 12 = 30
The correct equation is x + 12 = 30. The phrase 'the sum of a number and 12' means the unknown number x added to 12, and 'is 30' sets that sum equal to 30.
- Three times a number, decreased by 5, equals 16. Which equation models this?
- 3x - 5 = 16
- 3(x - 5) = 16
- 5 - 3x = 16
- 3x + 5 = 16
Correct answer: 3x - 5 = 16
The correct equation is 3x - 5 = 16. 'Three times a number' is 3x, 'decreased by 5' subtracts 5 to give 3x - 5, and 'equals 16' sets it equal to 16.
- A number divided by 4 gives 9. Which equation represents this?
- 4x = 9
- X - 4 = 9
- X + 4 = 9
- X/4 = 9
Correct answer: X/4 = 9
The correct equation is x/4 = 9. 'A number divided by 4' is written as x/4, and 'gives 9' sets that quotient equal to 9.
- Twice the sum of a number and 3 equals 18. Which equation models the statement?
- 2(x + 3) = 18
- 2x + 3 = 18
- 2x - 3 = 18
- X + 3 = 18
Correct answer: 2(x + 3) = 18
The correct equation is 2(x + 3) = 18. 'The sum of a number and 3' is (x + 3), and 'twice' that sum multiplies it by 2, giving 2(x + 3), which is set equal to 18.
- A nurse works x hours per day for 5 days and works a total of 40 hours. Which equation finds the daily hours?
- X + 5 = 40
- X/5 = 40
- 5x = 40
- 40x = 5
Correct answer: 5x = 40
The correct equation is 5x = 40. Working x hours per day for 5 days means 5 times x, and that total equaling 40 hours is written 5x = 40.
- Evaluate: (8 - 3) × 2 + 16 ÷ 4.
Correct answer: 14
The value is 14. Parentheses give 8 - 3 = 5, then multiplication and division go left to right: 5 × 2 = 10 and 16 ÷ 4 = 4. Finally add: 10 + 4 = 14.
- What is 7/10 written as a percentage?
Correct answer: 70%
The fraction 7/10 equals 70%. Dividing 7 by 10 gives the decimal 0.7, and multiplying by 100 converts it to 70%.
- If the ratio of nurses to patients is 1 to 6, how many nurses are needed for 48 patients?
- 6 nurses
- 8 nurses
- 42 nurses
- 12 nurses
Correct answer: 8 nurses
Eight nurses are needed. With one nurse for every 6 patients, dividing the 48 patients by 6 gives 48 ÷ 6 = 8 nurses.
- A drug is supplied as 200 mg per tablet, and the order is for 600 mg. How many tablets are needed?
- 2 tablets
- 4 tablets
- 3 tablets
- 6 tablets
Correct answer: 3 tablets
Three tablets are needed. Dividing the ordered dose of 600 mg by the 200 mg in each tablet gives 600 ÷ 200 = 3 tablets.
- Which sentence uses correct subject-verb agreement?
- The list of supplies are on the counter.
- The list of supplies is on the counter.
- The list of supplies were on the counter.
- The list of supplies be on the counter.
Correct answer: The list of supplies is on the counter.
The correct sentence is "The list of supplies is on the counter." The true subject is the singular noun "list," not the plural "supplies" in the prepositional phrase, so it takes the singular verb "is." Choices using "are" or "were" wrongly match the verb to the nearby plural noun.
- Choose the sentence with correct subject-verb agreement: "Neither the doctor nor the nurses ___ available right now."
Correct answer: Are
The correct verb is "are," giving "Neither the doctor nor the nurses are available right now." With "neither...nor," the verb agrees with the subject closer to it, which here is the plural "nurses," so the plural verb "are" is required. The singular forms "is," "was," and "has" would only fit a singular nearer subject.
- Which sentence is correct?
- Each of the patients have a chart.
- Each of the patients having a chart.
- Each of the patients have charts.
- Each of the patients has a chart.
Correct answer: Each of the patients has a chart.
The correct sentence is "Each of the patients has a chart." The pronoun "each" is always singular and serves as the subject, so it takes the singular verb "has" despite the plural "patients" in the phrase that follows. The versions with "have" mistakenly treat "patients" as the subject.
- Select the sentence with correct subject-verb agreement.
- There is several reasons for the delay.
- There be several reasons for the delay.
- There was several reasons for the delay.
- There are several reasons for the delay.
Correct answer: There are several reasons for the delay.
The correct sentence is "There are several reasons for the delay." In sentences beginning with "there," the verb agrees with the subject that follows, and the plural subject "reasons" requires the plural verb "are." The singular "is" and "was" fail to match the plural subject.
- Which sentence correctly matches the subject and verb?
- The team of researchers were celebrating its discovery.
- The team of researchers are celebrating their discovery.
- The team of researchers is celebrating its discovery.
- The team of researchers be celebrating its discovery.
Correct answer: The team of researchers is celebrating its discovery.
The correct sentence is "The team of researchers is celebrating its discovery." The collective noun "team" acts as a single unit here and takes the singular verb "is" and the singular pronoun "its." The plural verb "were" or "are" misreads "researchers" as the subject.
- Choose the correct verb: "Mathematics ___ a required subject for nursing students."
Correct answer: Is
The correct verb is "is," giving "Mathematics is a required subject for nursing students." Although it ends in an "s," "mathematics" is treated as a singular subject naming one field of study, so it takes the singular verb "is." The plural verbs "are" and "were" do not agree with this singular noun.
- Which sentence uses subject-verb agreement correctly?
- My favorite part of the lectures are the demonstrations.
- My favorite part of the lectures be the demonstrations.
- My favorite part of the lectures were the demonstrations.
- My favorite part of the lectures is the demonstrations.
Correct answer: My favorite part of the lectures is the demonstrations.
The correct sentence is "My favorite part of the lectures is the demonstrations." The subject is the singular noun "part," so it takes the singular verb "is" even though "lectures" and "demonstrations" are plural. Matching the verb to "lectures" would produce the incorrect "are" or "were."
- Select the sentence with the correct verb form.
- Everybody in the classes were given a syllabus.
- Everybody in the classes was given a syllabus.
- Everybody in the classes have a syllabus.
- Everybody in the classes are given a syllabus.
Correct answer: Everybody in the classes was given a syllabus.
The correct sentence is "Everybody in the classes was given a syllabus." The indefinite pronoun "everybody" is singular and is the subject, so it takes the singular verb "was." The plural verbs "were," "have," and "are" wrongly agree with the nearby plural "classes."
- Which sentence correctly uses a comma?
- After the long shift the nurse finally rested.
- After the long shift, the nurse finally rested.
- After, the long shift the nurse finally rested.
- After the long, shift the nurse finally rested.
Correct answer: After the long shift, the nurse finally rested.
The correct sentence is "After the long shift, the nurse finally rested." A comma belongs after an introductory phrase to separate it from the main clause that follows. The other versions place the comma inside the introductory phrase, where it breaks up words that belong together.
- Choose the sentence that uses commas correctly to separate items in a series.
- She packed bandages, gloves and a thermometer, and a notebook.
- She packed bandages gloves, thermometer and a notebook.
- She packed, bandages, gloves, a thermometer and a notebook.
- She packed bandages, gloves, a thermometer, and a notebook.
Correct answer: She packed bandages, gloves, a thermometer, and a notebook.
The correct sentence is "She packed bandages, gloves, a thermometer, and a notebook." Commas separate each item in a list, including before the final "and" joining the last item. The other versions drop needed commas between items or insert a comma after the verb "packed," where none belongs.
- Which sentence correctly uses an apostrophe?
- The patient's records were updated this morning.
- The patients records were updated this morning.
- The patients' record's were updated this morning.
- The patients record's were updated this morning.
Correct answer: The patient's records were updated this morning.
The correct sentence is "The patient's records were updated this morning." The apostrophe before the "s" in "patient's" shows that the records belong to one patient. The plural "records" needs no apostrophe, so the versions adding an apostrophe to "records" are wrong.
- Choose the sentence with correct punctuation.
- The schedule changed however no one was notified.
- The schedule changed, however no one was notified.
- The schedule changed however, no one was notified.
- The schedule changed; however, no one was notified.
Correct answer: The schedule changed; however, no one was notified.
The correct sentence is "The schedule changed; however, no one was notified." When the transition word "however" joins two independent clauses, a semicolon precedes it and a comma follows it. Using only commas creates a comma splice, and omitting punctuation runs the clauses together.
- Which sentence uses a comma correctly with a nonessential phrase?
- Dr. Reyes who runs the clinic, approved the plan.
- Dr. Reyes, who runs the clinic approved the plan.
- Dr. Reyes who runs the clinic approved the plan.
- Dr. Reyes, who runs the clinic, approved the plan.
Correct answer: Dr. Reyes, who runs the clinic, approved the plan.
The correct sentence is "Dr. Reyes, who runs the clinic, approved the plan." A nonessential clause that adds extra information is set off by a comma on each side. Using only one comma, or none, fails to fully enclose the inserted clause.
- Select the sentence that correctly punctuates a direct quotation.
- The instructor said, "Wash your hands before each visit."
- The instructor said "Wash your hands before each visit."
- The instructor said, Wash your hands before each visit.
- The instructor said, "Wash your hands before each visit".
Correct answer: The instructor said, "Wash your hands before each visit."
The correct sentence is the one reading: The instructor said, "Wash your hands before each visit." A comma introduces the quotation, quotation marks enclose the spoken words, and the period sits inside the closing quotation mark. The other versions drop the comma or quotation marks or misplace the period.
- Which sentence is a complete sentence rather than a fragment?
- The nurse charted the results.
- Because the medication arrived late.
- Running down the hospital hallway quickly.
- Although the test was finished.
Correct answer: The nurse charted the results.
The complete sentence is "The nurse charted the results." It contains a subject, "nurse," and a verb, "charted," and expresses a full thought. The other choices are fragments because they begin with a subordinating word or lack a subject and verb that complete the idea.
- Which option correctly fixes this run-on sentence: "The alarm sounded everyone left the building"?
- The alarm sounded everyone, left the building.
- The alarm sounded, everyone left the building.
- The alarm sounded; everyone left the building.
- The alarm sounded everyone left, the building.
Correct answer: The alarm sounded; everyone left the building.
The correct fix is "The alarm sounded; everyone left the building." A semicolon properly joins two complete, closely related independent clauses. Simply adding a comma creates a comma splice, and the other placements break the sentence in the wrong spots.
- Which sentence is a run-on that needs correction?
- The patient rested, and the family waited nearby.
- The patient rested the family waited nearby.
- While the patient rested, the family waited nearby.
- The patient rested; the family waited nearby.
Correct answer: The patient rested the family waited nearby.
The run-on is "The patient rested the family waited nearby." It joins two independent clauses with no conjunction or punctuation between them. The other three versions correctly join the clauses using a comma with "and," a subordinating word, or a semicolon.
- Which choice turns the fragment "Studying for the entrance exam every evening" into a complete sentence?
- Studying for the entrance exam every evening, and reviewing notes.
- Studying for the entrance exam every evening before bed.
- Maria studied for the entrance exam every evening.
- To study for the entrance exam every evening.
Correct answer: Maria studied for the entrance exam every evening.
The complete sentence is "Maria studied for the entrance exam every evening." Adding the subject "Maria" and the verb "studied" creates a full thought. The other choices remain fragments because they still lack a subject paired with a working main verb.
- Which sentence corrects the comma splice "The results were ready, the doctor reviewed them at once"?
- The results were ready, the doctor, reviewed them at once.
- The results were ready the doctor reviewed them at once.
- The results were ready so, the doctor reviewed them at once.
- The results were ready, so the doctor reviewed them at once.
Correct answer: The results were ready, so the doctor reviewed them at once.
The correct fix is "The results were ready, so the doctor reviewed them at once." Adding the coordinating conjunction "so" after the comma properly joins the two independent clauses. Removing the comma creates a run-on, and the other placements punctuate the conjunction incorrectly.
- Which sentence uses pronouns correctly?
- Each student must bring his or her own calculator.
- Each student must bring their own calculator.
- Each student must bring they own calculator.
- Each student must bring our own calculator.
Correct answer: Each student must bring his or her own calculator.
The correct sentence is "Each student must bring his or her own calculator." The singular subject "each student" requires a singular pronoun, and "his or her" matches in number. "Their" and "they" are plural, and "our" does not refer back to the third-person subject.
- Choose the sentence with correct pronoun case.
- The supervisor gave the new badges to Maria and I.
- The supervisor gave the new badges to Maria and me.
- The supervisor gave the new badges to I and Maria.
- The supervisor gave the new badges to myself and Maria.
Correct answer: The supervisor gave the new badges to Maria and me.
The correct sentence is "The supervisor gave the new badges to Maria and me." As the object of the preposition "to," the objective pronoun "me" is required. Removing "Maria" makes this clear, since "to me" is correct while "to I" is not, and "myself" cannot replace a simple object here.
- Which sentence uses a pronoun that agrees with its antecedent?
- The committee announced their decision on Friday.
- Neither of the women brought their badge.
- The hospital updated its visiting policy.
- Each of the nurses signed their timesheet.
Correct answer: The hospital updated its visiting policy.
The correct sentence is "The hospital updated its visiting policy." The singular antecedent "hospital" matches the singular pronoun "its." The other sentences pair the singular antecedents "committee," "neither," and "each" with the plural "their," which does not agree.
- Which sentence avoids an unclear pronoun reference?
- When Lisa met Dana, she was nervous.
- After the nurse spoke with the patient, she left.
- They say the new policy is strict.
- When the technician calibrated the machine, the technician noted the reading.
Correct answer: When the technician calibrated the machine, the technician noted the reading.
The clear sentence is "When the technician calibrated the machine, the technician noted the reading." Repeating the noun removes any doubt about who noted the reading. The other versions leave "she" or "they" pointing to more than one possible person or to no stated antecedent at all.
- Choose the sentence with the correct pronoun.
- Whom is responsible for the night shift?
- Who is responsible for the night shift?
- Whose is responsible for the night shift?
- Whomever is responsible for the night shift?
Correct answer: Who is responsible for the night shift?
The correct sentence is "Who is responsible for the night shift?" "Who" works as the subject of the verb "is." The object form "whom" and the possessive "whose" do not function as a subject, and "whomever" is also an object form.
- Which sentence maintains consistent verb tense?
- The nurse checked the chart and updates the records.
- The nurse checks the chart and updated the records.
- The nurse checked the chart and updated the records.
- The nurse checking the chart and updated the records.
Correct answer: The nurse checked the chart and updated the records.
The correct sentence is "The nurse checked the chart and updated the records." Both verbs, "checked" and "updated," stay in the past tense, keeping the actions consistent in time. The other versions mix past with present or use an incomplete verb form.
- Choose the sentence with consistent verb tense.
- As the patient describes her symptoms, the doctor wrote notes.
- As the patient described her symptoms, the doctor wrote notes.
- As the patient described her symptoms, the doctor writes notes.
- As the patient describes her symptoms, the doctor will wrote notes.
Correct answer: As the patient described her symptoms, the doctor wrote notes.
The correct sentence is "As the patient described her symptoms, the doctor wrote notes." Both "described" and "wrote" are past tense, so the two actions are consistently placed in the same time frame. The other versions shift awkwardly between present and past or use an incorrect verb form.
- Which sentence keeps the tense consistent?
- Yesterday she will review the notes and pass the quiz.
- Tomorrow she reviews the notes and passed the quiz.
- Last week she reviews the notes and passes the quiz.
- Yesterday she reviewed the notes and passed the quiz.
Correct answer: Yesterday she reviewed the notes and passed the quiz.
The correct sentence is "Yesterday she reviewed the notes and passed the quiz." The time word "yesterday" signals the past, and both "reviewed" and "passed" are past tense, so they agree. The other versions mismatch the time word with the verb tense or mix tenses within the sentence.
- Which sentence corrects the tense shift in "The researcher gathers the data, then she analyzed it carefully"?
- The researcher gathers the data, then she analyzed it carefully.
- The researcher gathered the data, then she analyzed it carefully.
- The researcher gathers the data, then she will analyzed it carefully.
- The researcher gathering the data, then she analyzed it carefully.
Correct answer: The researcher gathered the data, then she analyzed it carefully.
The correct sentence is "The researcher gathered the data, then she analyzed it carefully." Changing "gathers" to the past-tense "gathered" makes it match "analyzed," so both actions stay in the past. The other versions leave the present-tense verb in place or use a faulty verb form.
- Which sentence places the modifier correctly?
- The technician cleaned the boots covered in mud.
- Covered in mud, the technician cleaned the boots.
- Covered in mud, cleaning the boots was hard.
- The technician covered in mud cleaned the boots, dirty.
Correct answer: The technician cleaned the boots covered in mud.
The correct sentence is "The technician cleaned the boots covered in mud." The phrase "covered in mud" sits right next to "boots," the item it actually describes. Placing it at the front makes it seem the technician was covered in mud, creating a misplaced or dangling modifier.
- Which sentence contains a misplaced modifier?
- The patient was given a pamphlet about diabetes by the nurse.
- Smiling warmly, the nurse greeted the patient.
- The nurse handed a chart to the doctor who needed it.
- The nurse gave a pamphlet to the patient about diabetes that was new.
Correct answer: The nurse gave a pamphlet to the patient about diabetes that was new.
The sentence with a misplaced modifier is "The nurse gave a pamphlet to the patient about diabetes that was new." The phrase "that was new" sits far from "pamphlet," so it seems to describe "diabetes" instead. The other sentences keep their describing phrases beside the words they modify.
- Which sentence corrects the dangling modifier in "While reading the chart, the phone rang loudly"?
- While reading the chart, the phone rang loudly.
- The phone rang loudly while reading the chart.
- While the nurse was reading the chart, the phone rang loudly.
- Reading the chart, the phone rang loudly while the nurse.
Correct answer: While the nurse was reading the chart, the phone rang loudly.
The correct fix is "While the nurse was reading the chart, the phone rang loudly." Naming "the nurse" gives the modifying phrase a logical subject to describe, since a phone cannot read a chart. The other versions leave the phrase dangling with no proper subject to attach to.
- Which sentence is the clearest because the modifier is placed correctly?
- The student almost answered every question on the test.
- The student answered almost every question on the test.
- Almost the student answered every question on the test.
- The student answered every question almost on the test.
Correct answer: The student answered almost every question on the test.
The clearest sentence is "The student answered almost every question on the test." Placing "almost" right before "every question" shows the student answered nearly all of them. Putting "almost" before "answered" suggests the student nearly answered but did not, which changes the meaning.
- Which sentence uses the correct word, affect or effect?
- The new policy will affect every department.
- The new policy will effect every department.
- The new policy will affecting every department.
- The new policy will effecting every department.
Correct answer: The new policy will affect every department.
The correct sentence is "The new policy will affect every department." The verb "affect" means to influence or have an impact on something. "Effect" is most often a noun meaning a result, so it does not fit as the action verb here.
- Choose the sentence with the correct word.
- The clinic is loosing patients to the new hospital.
- Their going to update the records tomorrow.
- You should take the medication with food, not on an empty stomach.
- The supplies are over they're by the door.
Correct answer: You should take the medication with food, not on an empty stomach.
The correct sentence is "You should take the medication with food, not on an empty stomach." Every word is used correctly. The other sentences misuse "loosing" for "losing," "their" for "they're," and "they're" for "there."
- Which sentence uses "its" and "it's" correctly?
- Its almost time for the exam, and the room lost its key.
- It's almost time for the exam, and the room lost it's key.
- Its almost time for the exam, and the room lost it's key.
- It's almost time for the exam, and the room lost its key.
Correct answer: It's almost time for the exam, and the room lost its key.
The correct sentence is "It's almost time for the exam, and the room lost its key." "It's" is the contraction of "it is," while "its" shows possession with no apostrophe. The other versions reverse these two forms in one place or both.
- Choose the sentence that uses the correct word.
- There were fewer complications than expected.
- There were less complications than expected.
- There were lesser complications than expected.
- There were fewest complications than expected.
Correct answer: There were fewer complications than expected.
The correct sentence is "There were fewer complications than expected." "Fewer" is used for items that can be counted, and complications can be counted individually. "Less" is reserved for amounts that cannot be counted, so it does not fit here.
- Which sentence uses the correct word?
- The medicine had a strong affect on her recovery.
- Please ensure the door is locked before leaving.
- The patient felt worse then he had the day before.
- She could of finished the form sooner.
Correct answer: Please ensure the door is locked before leaving.
The correct sentence is "Please ensure the door is locked before leaving." "Ensure" correctly means to make certain. The other sentences misuse "affect" for the noun "effect," "then" for the comparison word "than," and "could of" for "could have."
- A paragraph opens with the sentence "There are several simple ways to prevent the spread of infection in a clinic." Which sentence would best continue the paragraph?
- My favorite season of the year is autumn.
- The clinic was built more than thirty years ago.
- First, staff should wash their hands before and after every patient contact.
- Many people enjoy taking long walks on weekends.
Correct answer: First, staff should wash their hands before and after every patient contact.
The best continuation is "First, staff should wash their hands before and after every patient contact." It directly develops the topic of preventing infection that the opening sentence introduces. The other choices wander to unrelated subjects and do not support the paragraph's main idea.
- A writer wants to add support to a paragraph arguing that exercise improves sleep. Which sentence best develops that point?
- Studies show that people who exercise regularly tend to fall asleep faster.
- Exercise clothing comes in many colors and styles.
- Some gyms are open twenty-four hours a day.
- The first modern Olympic Games were held in 1896.
Correct answer: Studies show that people who exercise regularly tend to fall asleep faster.
The best supporting sentence is "Studies show that people who exercise regularly tend to fall asleep faster." It provides evidence that directly backs the claim that exercise improves sleep. The other sentences mention exercise loosely but offer no support for the link to better sleep.
- In a paragraph about the benefits of drinking water, which sentence is irrelevant and should be removed?
- Staying hydrated helps the body regulate its temperature.
- Water supports healthy kidney function.
- The cafeteria recently added three new dessert options.
- Drinking enough water can improve concentration.
Correct answer: The cafeteria recently added three new dessert options.
The sentence that should be removed is "The cafeteria recently added three new dessert options." It has nothing to do with the benefits of drinking water, which is the paragraph's focus. The other three sentences each describe a clear benefit of hydration.
- A paragraph needs a concluding sentence after explaining how handwashing, masks, and clean surfaces reduce illness. Which sentence best concludes it?
- Masks come in many different sizes.
- Together, these simple habits greatly lower the risk of spreading illness.
- Soap was first made thousands of years ago.
- Some surfaces are easier to clean than others.
Correct answer: Together, these simple habits greatly lower the risk of spreading illness.
The best concluding sentence is "Together, these simple habits greatly lower the risk of spreading illness." It ties the listed practices into a unified closing idea that wraps up the paragraph. The other options introduce minor side details instead of summarizing the main point.
- Four sentences are scrambled. Which order makes the most logical paragraph? (1) Finally, dry your hands with a clean towel. (2) First, wet your hands with clean water. (3) Then scrub with soap for at least twenty seconds. (4) Next, rinse the soap away thoroughly.
- 2, 3, 4, 1
- 1, 2, 3, 4
- 3, 2, 1, 4
- 4, 3, 2, 1
Correct answer: 2, 3, 4, 1
The logical order is 2, 3, 4, 1. The signal words guide the sequence: "First" wet the hands, "Then" scrub with soap, "Next" rinse, and "Finally" dry. Any other arrangement places these transition words out of their natural step-by-step order.
- Which transition word best fits the blank? "The patient followed every instruction carefully; ___, her recovery went smoothly."
- However
- Nevertheless
- As a result
- In contrast
Correct answer: As a result
The best transition is "as a result," giving "The patient followed every instruction carefully; as a result, her recovery went smoothly." The smooth recovery is an outcome of following instructions, so a cause-and-effect transition fits. Words like "however" and "in contrast" signal opposition, which the sentence does not express.
- A passage describes a problem in one paragraph and proposes a fix in the next. Which sentence best opens the second paragraph to signal that shift?
- For example, the waiting room is often crowded.
- In addition, the parking lot is also small.
- To address this issue, the clinic could schedule appointments in shorter blocks.
- Similarly, the hallways feel narrow during busy hours.
Correct answer: To address this issue, the clinic could schedule appointments in shorter blocks.
The best opening is "To address this issue, the clinic could schedule appointments in shorter blocks." The phrase "To address this issue" signals a move from describing a problem to offering a solution. The other choices use transitions that merely add more examples rather than introduce a fix.
- Where should the sentence "For these reasons, regular checkups are worth the time they take" most logically be placed in a paragraph?
- As the first sentence, before any reasons are given
- In the middle, between two unrelated facts
- At the end, after the reasons have been presented
- Immediately after the topic sentence, before any support
Correct answer: At the end, after the reasons have been presented
The sentence belongs at the end, after the reasons have been presented. The phrase "For these reasons" refers back to points already made, so it works as a closing statement. Placing it at the start or before the supporting reasons would leave "these reasons" with nothing to point to.
- A diabetic patient's blood glucose climbs after a meal, and insulin is released to bring it down. Once blood glucose returns to normal, insulin release decreases. This shut-off when the set point is reached is characteristic of:
- Positive feedback amplifying the change
- Negative feedback turning off the response once balance is restored
- A reflex arc bypassing the brain
- Active transport against a gradient
Correct answer: Negative feedback turning off the response once balance is restored
Insulin release decreasing once glucose normalizes is negative feedback turning off the response once balance is restored. The corrected variable signals back to reduce the very response that fixed it, preventing overshoot.
- Which of the following best represents the components of a homeostatic control system in their correct functional order?
- Effector, control center, receptor, response
- Set point, effector, stimulus, receptor
- Receptor, control center, effector, response
- Response, receptor, effector, control center
Correct answer: Receptor, control center, effector, response
The correct order is receptor, control center, effector, response. A receptor detects the change, the control center processes it and decides on a response, and the effector carries out the action that produces the response.
- Maintaining stable blood pressure, steady blood glucose, and constant body temperature are all examples of the body working to keep variables near a target value. This target value is known as the:
- Stimulus
- Gradient
- Threshold of an action potential
- Set point
Correct answer: Set point
The target value the body works to maintain is the set point. Homeostatic mechanisms continually adjust effectors to keep regulated variables fluctuating only slightly around this ideal value.
- Gastric juice in the stomach is highly acidic, with a pH close to 2. Compared with neutral water at pH 7, this stomach fluid has a hydrogen ion concentration that is about:
- 5 times greater
- 10 times greater
- 100,000 times greater
- Slightly lower
Correct answer: 100,000 times greater
Stomach fluid at pH 2 has about 100,000 times more hydrogen ions than water at pH 7. Each pH unit is a tenfold change, and the five-unit difference equals 10 to the fifth power, or 100,000.
- On the pH scale used for aqueous solutions, the full range of values typically runs from:
- 0 to 14
- 1 to 7
- 0 to 100
- Negative 7 to positive 7
Correct answer: 0 to 14
The pH scale typically runs from 0 to 14. Values below 7 indicate acidic solutions, 7 is neutral, and values above 7 up to 14 indicate increasingly basic solutions.
- An indicator paper dipped into a solution turns red, signaling a strongly acidic sample. Which pH reading is most consistent with this result?
Correct answer: pH 2
A strongly acidic sample is most consistent with a pH of 2. Acidic solutions fall below 7 on the scale, and the lower the number, the more strongly acidic the solution is.
- The dense central core of an atom, which contains the protons and neutrons, is called the:
- Electron cloud
- Valence shell
- Orbital ring
- Nucleus
Correct answer: Nucleus
The dense central core containing protons and neutrons is the nucleus. It holds nearly all of the atom's mass, while the much lighter electrons move in the space surrounding it.
- Compared with a proton, an electron has:
- A positive charge and the same mass
- A negative charge and a much smaller mass
- No charge and a much larger mass
- A positive charge and no mass
Correct answer: A negative charge and a much smaller mass
An electron has a negative charge and a much smaller mass than a proton. Protons carry a positive charge and are far more massive, while electrons contribute almost nothing to an atom's total mass.
- When two atoms form a covalent bond, they are held together because the atoms:
- Completely transfer electrons to form ions
- Share one or more pairs of electrons
- Exchange protons in the nucleus
- Release neutrons to each other
Correct answer: Share one or more pairs of electrons
Atoms joined by a covalent bond share one or more pairs of electrons. By sharing electrons rather than transferring them, each atom can fill its outer shell and become more stable.
- The number of protons in an atom's nucleus is known as its:
- Mass number
- Atomic number
- Valence number
- Charge number
Correct answer: Atomic number
The number of protons in the nucleus is the atomic number. It identifies the element and equals the number of electrons in a neutral atom, while the mass number counts protons plus neutrons.
- Which part of the brain coordinates balance, posture, and the fine timing of voluntary muscle movements?
- The cerebrum
- The cerebellum
- The medulla oblongata
- The hypothalamus
Correct answer: The cerebellum
The cerebellum coordinates balance, posture, and the fine timing of voluntary movements. It fine-tunes motor activity so that movements are smooth and well-coordinated rather than jerky.
- The central nervous system is made up of which two structures?
- The brain and the spinal cord
- The nerves and the muscles
- The sensory and motor neurons
- The sympathetic and parasympathetic divisions
Correct answer: The brain and the spinal cord
The central nervous system is made up of the brain and the spinal cord. The nerves that branch out to the rest of the body belong instead to the peripheral nervous system.
- Damage to the medulla oblongata at the base of the brainstem is especially life-threatening because this region controls:
- Memory and reasoning
- Color vision
- Automatic functions such as breathing and heart rate
- The sense of taste only
Correct answer: Automatic functions such as breathing and heart rate
Damage to the medulla oblongata is life-threatening because it controls automatic functions such as breathing and heart rate. These vital reflexes continue without conscious effort, so injury here can stop them.
- An electrical signal that travels rapidly down the length of a neuron's axon is called a(n):
- Hormone surge
- Action potential (nerve impulse)
- Concentration gradient
- Reflex hormone
Correct answer: Action potential (nerve impulse)
The rapid electrical signal traveling down an axon is an action potential, or nerve impulse. It is produced by ions moving across the membrane and carries the message toward the axon terminal.
- Which type of cell carries genetic information from one generation to the next and contains only half the usual number of chromosomes?
- A skin cell
- A red blood cell
- A sex cell (gamete)
- A nerve cell
Correct answer: A sex cell (gamete)
A sex cell, or gamete, carries genetic information to the next generation and contains half the usual chromosome number. This haploid count allows two gametes to combine at fertilization to restore the full set.
- Where in the cell is the genetic material (DNA) primarily stored?
- In the mitochondria only
- In the cell membrane
- In the cytoplasm freely floating
- In the nucleus
Correct answer: In the nucleus
Genetic material is primarily stored in the nucleus. This membrane-bound organelle houses the DNA and directs the cell's activities, including growth, repair, and reproduction.
- A red blood cell is placed in pure distilled water. Because water moves toward the higher solute concentration, the cell will most likely:
- Shrink as water leaves it
- Swell and possibly burst as water enters it
- Stay exactly the same size
- Begin actively pumping out salt
Correct answer: Swell and possibly burst as water enters it
In pure distilled water, a red blood cell will swell and possibly burst as water enters it. The cell's interior has more solutes than the surrounding water, so water moves inward by osmosis until the cell may rupture.
- Small structures that read the cell's genetic instructions and assemble amino acids into proteins are called:
- Lysosomes
- Ribosomes
- Vacuoles
- Centrioles
Correct answer: Ribosomes
The structures that assemble amino acids into proteins are ribosomes. They follow the instructions carried from the DNA and link amino acids together to build the proteins the cell needs.
- As filtered fluid passes through the kidney tubule, useful substances such as water, glucose, and needed ions are returned to the blood. This process is called:
- Filtration
- Reabsorption
- Secretion
- Excretion
Correct answer: Reabsorption
Returning useful substances such as water, glucose, and ions from the tubule back to the blood is reabsorption. It recovers valuable materials so they are not lost in the urine.
- Inside the nephron, the tuft of tiny capillaries where blood is initially filtered is called the:
- Alveolus
- Ureter
- Villus
- Glomerulus
Correct answer: Glomerulus
The tuft of capillaries where blood is initially filtered is the glomerulus. Pressure forces water and small solutes out of this capillary cluster into the surrounding capsule to begin urine formation.
- After urine is formed in the kidneys, it travels to the urinary bladder for storage by way of the:
- Urethra
- Ureters
- Renal arteries
- Bile ducts
Correct answer: Ureters
Urine travels from the kidneys to the bladder through the ureters. These muscular tubes carry urine downward, while the urethra later transports it from the bladder out of the body.
- Which type of immune cell directly attacks and destroys the body's own cells that have become infected by a virus?
- Cytotoxic (killer) T cells
- Red blood cells
- Platelets
- Plasma cells producing antibodies
Correct answer: Cytotoxic (killer) T cells
Cytotoxic, or killer, T cells directly attack and destroy the body's own virus-infected cells. By eliminating infected cells, they stop the virus inside from making more copies.
- A foreign molecule that the immune system recognizes as not belonging to the body and that triggers an immune response is called a(n):
- Antibody
- Antigen
- Buffer
- Hormone
Correct answer: Antigen
A foreign molecule recognized as not belonging to the body and triggering an immune response is an antigen. Antibodies are then produced to bind these antigens and help eliminate the threat.
- A patient with HIV has a severely reduced number of helper T cells. Based on the role of these cells, the patient is most likely to experience:
- Frequent infections because the immune response is weakened
- Faster blood clotting than normal
- Increased oxygen-carrying capacity
- Better digestion of fats
Correct answer: Frequent infections because the immune response is weakened
With few helper T cells, the patient is most likely to experience frequent infections because the immune response is weakened. Helper T cells coordinate other immune cells, so losing them cripples the body's defenses.
- Which electrolyte is the major positively charged ion found INSIDE body cells and is critical for normal nerve and muscle signaling?
- Sodium
- Calcium
- Chloride
- Potassium
Correct answer: Potassium
Potassium is the major positively charged ion inside body cells and is critical for nerve and muscle signaling. Its movement across the cell membrane helps generate the electrical signals these tissues rely on.
- Roughly what fraction of the adult human body is made up of water?
- About 10 percent
- About 25 percent
- About 60 percent
- About 95 percent
Correct answer: About 60 percent
Water makes up about 60 percent of the adult human body. This large proportion is why maintaining fluid and electrolyte balance is so important for normal body function.
- The fluid located inside the body's cells is specifically referred to as:
- Intracellular fluid
- Plasma
- Lymph
- Bile
Correct answer: Intracellular fluid
The fluid inside the body's cells is called intracellular fluid. Fluid found outside the cells, such as plasma and the fluid surrounding tissues, is referred to as extracellular fluid.
- When carbon dioxide dissolves in the blood, it combines with water to form carbonic acid. This relationship explains why a buildup of carbon dioxide tends to make the blood:
- More acidic, lowering the pH
- More basic, raising the pH
- Completely neutral regardless of amount
- Unable to carry any oxygen
Correct answer: More acidic, lowering the pH
A buildup of carbon dioxide tends to make the blood more acidic, lowering the pH. Because dissolved carbon dioxide forms carbonic acid, higher levels add hydrogen ions and increase acidity.
- A condition in which the blood becomes too basic, with a pH above the normal range, is called:
- Acidosis
- Alkalosis
- Dehydration
- Anemia
Correct answer: Alkalosis
A condition in which the blood becomes too basic, with a pH above normal, is alkalosis. It is the opposite of acidosis and can result from excessive loss of acid or hyperventilation.
- The lungs and the kidneys are the two organs primarily responsible for the long-term regulation of blood pH. They do this mainly by adjusting the levels of:
- Carbon dioxide and bicarbonate
- Glucose and insulin
- Calcium and phosphate
- Red blood cells and platelets
Correct answer: Carbon dioxide and bicarbonate
The lungs and kidneys regulate blood pH mainly by adjusting carbon dioxide and bicarbonate. The lungs control carbon dioxide through breathing, while the kidneys control bicarbonate and hydrogen ion excretion.
- Which chamber of the heart is the most muscular because it must pump oxygen-rich blood out to the entire body?
- The right atrium
- The left atrium
- The right ventricle
- The left ventricle
Correct answer: The left ventricle
The left ventricle is the most muscular chamber because it pumps oxygen-rich blood to the entire body. Its thick wall generates the high pressure needed to push blood through the systemic circulation.
- Which blood vessels return oxygen-poor blood back toward the heart and contain valves that prevent backflow?
- Arteries
- Veins
- Capillaries
- Arterioles
Correct answer: Veins
Veins return oxygen-poor blood toward the heart and contain valves that prevent backflow. Because blood pressure in veins is low, these one-way valves keep blood moving in the correct direction.
- A person's resting heart rate is measured at 72 beats per minute. This rhythmic beating most directly reflects the repeated:
- Filtration of blood in the kidneys
- Contraction and relaxation of the heart's chambers
- Exchange of gases in the alveoli
- Release of hormones from the thyroid
Correct answer: Contraction and relaxation of the heart's chambers
A heart rate of 72 beats per minute reflects the repeated contraction and relaxation of the heart's chambers. Each beat is one cycle of the chambers squeezing to eject blood and then relaxing to refill.
- The transparent front surface of the eye that first bends incoming light and helps focus it is called the:
- Retina
- Cornea
- Optic nerve
- Iris
Correct answer: Cornea
The transparent front surface that first bends incoming light is the cornea. It provides much of the eye's focusing power before light passes through the lens to reach the retina.
- The colored part of the eye that adjusts the size of the pupil to control how much light enters is the:
Correct answer: Iris
The colored part of the eye that controls how much light enters is the iris. It changes the size of the pupil, widening it in dim light and narrowing it in bright light.
- Receptors in the skin that respond to pressure, temperature, and pain are part of which general sense?
- The sense of touch (somatosensation)
- The sense of smell
- The sense of hearing
- The sense of taste
Correct answer: The sense of touch (somatosensation)
Skin receptors that respond to pressure, temperature, and pain are part of the sense of touch, or somatosensation. These receptors send information about the body's surface and surroundings to the brain.
- During normal quiet exhalation, air leaves the lungs mainly because the:
- Diaphragm relaxes and the chest cavity becomes smaller
- Diaphragm contracts and flattens
- Heart pumps air outward
- Alveoli actively push air with ATP
Correct answer: Diaphragm relaxes and the chest cavity becomes smaller
During quiet exhalation, air leaves the lungs because the diaphragm relaxes and the chest cavity becomes smaller. This raises the pressure inside the lungs, pushing air out without active muscular effort.
- Trace the correct path of air from the throat down to the sites of gas exchange in the lungs.
- Trachea, then bronchi, then bronchioles, then alveoli
- Alveoli, then trachea, then bronchi, then bronchioles
- Bronchioles, then alveoli, then trachea, then bronchi
- Bronchi, then alveoli, then trachea, then bronchioles
Correct answer: Trachea, then bronchi, then bronchioles, then alveoli
Air travels through the trachea, then the bronchi, then the bronchioles, and finally reaches the alveoli. The passages branch into ever-smaller tubes that end at the alveoli, where gas exchange occurs.
- The endocrine gland often called the master gland because it directs the activity of several other glands is the:
- Pancreas
- Pituitary gland
- Thymus
- Adrenal gland
Correct answer: Pituitary gland
The gland often called the master gland is the pituitary gland. It releases hormones that direct the activity of many other endocrine glands, coordinating widespread functions in the body.
- A hormone affects only certain cells in the body. The reason a hormone acts on some cells but not others is that the target cells have specific:
- Receptors that recognize and bind that hormone
- Higher temperatures than other cells
- Larger nuclei than other cells
- More mitochondria than other cells
Correct answer: Receptors that recognize and bind that hormone
A hormone acts only on cells that have specific receptors that recognize and bind it. Cells without the matching receptor cannot respond, which is why a hormone affects some tissues and not others.
- A hormone that helps the body conserve water by signaling the kidneys to reabsorb more of it is:
- Antidiuretic hormone (ADH)
- Insulin
- Adrenaline
- Thyroxine
Correct answer: Antidiuretic hormone (ADH)
The hormone that helps conserve water by signaling the kidneys to reabsorb more of it is antidiuretic hormone, or ADH. When the body is low on water, ADH reduces urine output to retain fluid.
- A scientist wants to test whether a new fertilizer increases plant growth. She gives fertilizer to one group of plants and no fertilizer to an otherwise identical group. The group receiving no fertilizer serves as the:
- Independent variable
- Control group
- Hypothesis
- Dependent variable
Correct answer: Control group
The group receiving no fertilizer serves as the control group. It provides a baseline of normal growth so any difference seen in the treated plants can be attributed to the fertilizer.
- In a fair test of one factor, the variables that must be kept the same in all groups so they do not affect the results are called:
- Dependent variables
- Controlled (constant) variables
- Hypotheses
- Conclusions
Correct answer: Controlled (constant) variables
Variables kept the same across all groups so they do not affect the results are controlled, or constant, variables. Holding them steady ensures that only the independent variable can explain any differences observed.
- Which organ produces bile, a substance that helps break large fat globules into smaller droplets during digestion?
- The liver
- The kidney
- The spleen
- The lungs
Correct answer: The liver
The liver produces bile, which helps break large fat globules into smaller droplets. This emulsification increases the surface area of fats so that digestive enzymes can act on them more effectively.
- One of the main functions of the large intestine is to:
- Absorb water and form solid waste
- Produce insulin for blood sugar control
- Add oxygen to the blood
- Filter wastes the way the kidney does
Correct answer: Absorb water and form solid waste
A main function of the large intestine is to absorb water and form solid waste. As material passes through, water is reclaimed for the body and the remaining waste is compacted into feces.
- On a hot day, a hiker drinks little water and becomes mildly dehydrated. The sensation of thirst that drives her to seek water is best understood as a homeostatic mechanism because it:
- Permanently lowers the body's normal water set point
- Amplifies the fluid loss the way positive feedback would
- Prompts behavior that restores fluid levels toward the normal set point
- Has no measurable effect on internal balance
Correct answer: Prompts behavior that restores fluid levels toward the normal set point
Thirst is homeostatic because it prompts behavior that restores fluid levels toward the normal set point. By driving the hiker to drink, it corrects the deficit and returns body water to its balanced range.
- Passage: "The glass frog has skin so transparent that, when viewed from below, its beating heart and other internal organs are clearly visible. This unusual feature helps the frog blend into the leaves it rests on, hiding its outline from predators looking up from beneath." What is the main idea of this passage?
- Glass frogs are the only frogs with hearts
- The glass frog's transparent skin helps it hide from predators
- Predators cannot see any frogs from below
- Glass frogs prefer to live in open water
Correct answer: The glass frog's transparent skin helps it hide from predators
The main idea is that the glass frog's transparent skin helps it hide from predators. The passage explains that the see-through skin lets the frog blend into leaves and conceal its outline from predators below. The other choices make claims about hearts, all frogs, or habitat that the passage does not support.
- Passage: "The shopkeeper had locked the till an hour early, swept the floor twice, and kept glancing at the clock and then at the gathering storm clouds outside." What can the reader most reasonably infer about the shopkeeper?
- The shopkeeper planned to keep the shop open all night
- The shopkeeper was hoping to close up and leave before the storm
- The shopkeeper had forgotten how to lock the till
- The shopkeeper was expecting a large crowd of customers
Correct answer: The shopkeeper was hoping to close up and leave before the storm
The reader can infer the shopkeeper was hoping to close up and leave before the storm. Locking the till early, sweeping twice, and watching both the clock and the storm clouds point to wanting to finish and go. Nothing suggests staying open all night, confusion, or expecting a crowd.
- Passage: "The committee's final report was unbiased, presenting the strengths and weaknesses of every proposal with equal care and refusing to favor any one group over another." As used in this passage, "unbiased" most nearly means:
- Fair and free from favoritism
- Confusing and disorganized
- Strongly one-sided
- Hasty and careless
Correct answer: Fair and free from favoritism
In context, "unbiased" most nearly means fair and free from favoritism. The clue that the report treated every proposal with equal care and favored no group signals balance. One-sided would be the opposite, and confusing or careless does not match the careful fairness described.
- Passage: "A tsunami is not a single towering wave but a series of waves, and the first one is often not the largest. Officials warn people to stay away from the coast for hours, because later waves can be far more destructive than the first." According to the passage, why do officials warn people to stay away from the coast for hours?
- Because the first wave is always the most dangerous
- Because tsunamis only occur at night
- Because later waves can be more destructive than the first
- Because the coast is too crowded to be safe
Correct answer: Because later waves can be more destructive than the first
According to the passage, officials warn people to stay away for hours because later waves can be more destructive than the first. The text states a tsunami is a series of waves and the first is often not the largest. The claims about the first wave being worst, night timing, and crowding are not given as reasons.
- Passage: "The op-ed opens by listing the rising costs families face, then calls on the city council to expand its child-care subsidy before more parents are forced to leave the workforce." What is the author's main purpose in this passage?
- To describe how children learn to read
- To explain the history of the city council
- To list the names of local businesses
- To persuade the council to expand child-care subsidies
Correct answer: To persuade the council to expand child-care subsidies
The author's main purpose is to persuade the council to expand child-care subsidies. The op-ed lays out rising family costs and then urges the council to act before parents leave their jobs. It does not describe how children read, recount council history, or list businesses.
- Passage: "The new recruit's enthusiasm was contagious; within a week, even the most jaded members of the crew were arriving early and volunteering for extra shifts." As used in this passage, "contagious" most nearly means:
- Easily spread to others
- Harmful and toxic
- Quiet and unnoticed
- Brief and forgettable
Correct answer: Easily spread to others
In context, "contagious" most nearly means easily spread to others. The recruit's enthusiasm spread until even jaded crew members caught it and changed their behavior. Harmful, quiet, and brief all conflict with the way the energy passed to others.
- Passage: "The recipe card listed the steps clearly: preheat the oven, mix the dry ingredients first, fold in the eggs last, and bake for exactly twenty-two minutes." According to the passage, what should the cook do last before baking?
- Preheat the oven
- Mix the dry ingredients
- Fold in the eggs
- Set a timer for an hour
Correct answer: Fold in the eggs
According to the passage, the cook should fold in the eggs last before baking. The recipe lists folding in the eggs as the final step after preheating and mixing the dry ingredients. Preheating, mixing the dry ingredients, and a one-hour timer do not match the stated order.
- Passage: "One scientist argues that the species is recovering, pointing to rising population counts in protected reserves. Another counters that those gains are fragile, warning that a single bad season could erase a decade of progress." How do the two scientists' views compare?
- Both scientists agree the species is fully recovered
- They offer differing assessments of how secure the species' recovery is
- Both scientists believe the species is already extinct
- They are describing two completely different species
Correct answer: They offer differing assessments of how secure the species' recovery is
The two scientists offer differing assessments of how secure the species' recovery is. One points to rising counts as evidence of recovery, while the other warns the gains are fragile and easily reversed. They do not both agree on full recovery or extinction, and they discuss the same species.
- Passage: "The salt flats stretch for miles in perfect, blinding white, so flat and featureless that travelers lose all sense of distance, and a far-off mountain can seem close enough to touch." Why does the author most likely describe the salt flats in this way?
- To convey the vast, disorienting emptiness of the landscape
- To explain how salt is harvested for cooking
- To warn travelers that the area is crowded
- To list the animals that live on the flats
Correct answer: To convey the vast, disorienting emptiness of the landscape
The author most likely describes the salt flats to convey the vast, disorienting emptiness of the landscape. Images of endless white and a lost sense of distance create a feeling of overwhelming, featureless space. The passage does not explain salt harvesting, mention crowds, or list animals.
- Evaluate: 24 - 18 ÷ (3 + 6) + 2³.
Correct answer: 30
The value is 30. Following order of operations, first do the parentheses (3 + 6 = 9), then the exponent (2³ = 8), then division (18 ÷ 9 = 2), and finally left-to-right addition and subtraction: 24 - 2 + 8 = 30.
- What is √(144) added to √(81) ?
Correct answer: 21
The sum is 21. √(144) is 12 because 12 × 12 = 144, and √(81) is 9 because 9 × 9 = 81; adding gives 12 + 9 = 21.
- Round the number 7,468 to the nearest hundred.
Correct answer: 7,500
The result is 7,500. The hundreds digit is 4, and the digit to its right (the tens digit) is 6, which is 5 or greater, so the hundreds digit rounds up from 4 to 5, giving 7,500.
- What is the value of -8 + 15 - (-3)?
Correct answer: 10
The value is 10. Subtracting a negative is the same as adding, so the expression becomes -8 + 15 + 3; working left to right, -8 + 15 = 7, then 7 + 3 = 10.
- What is the product of -6 and -7?
Correct answer: 42
The product is 42. When two negative numbers are multiplied, the result is positive, and 6 × 7 = 42, so -6 multiplied by -7 equals positive 42.
- A rectangular room measures 12 feet by 9 feet. What is its area in square feet?
Correct answer: 108
The area is 108 square feet. The area of a rectangle equals length times width, so 12 feet multiplied by 9 feet equals 108 square feet.
- What is the perimeter of a rectangle that is 14 centimeters long and 6 centimeters wide?
Correct answer: 40
The perimeter is 40 centimeters. Perimeter equals two times the sum of length and width: 2 × (14 + 6) = 2 × 20 = 40 centimeters.
- A circular bandage has a radius of 5 centimeters. Using 3.14 for pi, what is its area in square centimeters?
Correct answer: 78.5
The area is 78.5 square centimeters. The area of a circle equals pi times the radius squared: 3.14 × (5 × 5) = 3.14 × 25 = 78.5 square centimeters.
- Estimate the product of 49 and 21 by rounding each number to the nearest ten.
Correct answer: 1,000
The estimate is 1,000. Rounding 49 to the nearest ten gives 50 and rounding 21 gives 20, so the estimated product is 50 × 20 = 1,000.
- Subtract: 5.4 minus 2.75.
Correct answer: 2.65
The difference is 2.65. Aligning the decimal points and subtracting (treating 5.4 as 5.40), 5.40 - 2.75 = 2.65.
- What is 0.6 multiplied by 0.4?
Correct answer: 0.24
The product is 0.24. Multiplying 6 by 4 gives 24, and since each factor has one decimal place, the product has two decimal places, giving 0.24.
- What is 7/8 minus 1/4?
Correct answer: 5/8
The difference is 5/8. Rewriting 1/4 with a common denominator of 8 gives 2/8, so 7/8 - 2/8 = 5/8, which is already in lowest terms.
- What is 3 1/2 divided by 1/4?
Correct answer: 14
The quotient is 14. Convert 3 1/2 to the improper fraction 7/2, then divide by 1/4 by multiplying by the reciprocal: 7/2 x 4/1 = 28/2 = 14.
- A data set contains the values 4, 7, 7, 9, and 13. What is the range of the data set?
Correct answer: 9
The range is 9. The range equals the largest value minus the smallest value, so 13 - 4 = 9.
- A bag holds 3 red, 5 blue, and 2 green chips. If one chip is drawn at random, what is the probability it is blue?
Correct answer: 1/2
The probability is 1/2. There are 5 blue chips out of 3 + 5 + 2 = 10 total chips, so the probability is 5/10, which reduces to 1/2.
- What is the value of 2,300 expressed in scientific notation?
- 2.3 × 10³
- 23 × 10²
- 2.3 × 10⁴
- 0.23 × 10⁴
Correct answer: 2.3 × 10³
The correct form is 2.3 × 10³. Scientific notation requires one nonzero digit before the decimal point; moving the decimal in 2,300 three places left gives 2.3, so the exponent on 10 is 3.
- A nurse worked shifts of 8 hours, 12 hours, 10 hours, and 6 hours over four days. What was the average shift length in hours?
Correct answer: 9
The average is 9 hours. Add the shift lengths (8 + 12 + 10 + 6 = 36) and divide by the number of shifts (4), giving 36 ÷ 4 = 9 hours.
- A patient receives an IV fluid at a constant rate of 125 milliliters per hour. How many milliliters will the patient receive in 6 hours?
Correct answer: 750
The patient receives 750 milliliters. At a constant rate, total volume equals rate times time, so 125 milliliters per hour multiplied by 6 hours equals 750 milliliters.
- Which sentence uses correct subject-verb agreement when the subject follows a phrase beginning with not?
- The nurse, not the technicians, are responsible for the count.
- The nurse, not the technicians, is responsible for the count.
- The nurse, not the technicians, were responsible for the count.
- The nurse, not the technicians, be responsible for the count.
Correct answer: The nurse, not the technicians, is responsible for the count.
The correct sentence reads "The nurse, not the technicians, is responsible for the count." A phrase introduced by "not" does not change the subject, so the singular "nurse" keeps the singular verb "is." The plural verbs "are" and "were" wrongly agree with "technicians."
- Choose the sentence that uses a hyphen correctly in a compound modifier before a noun.
- She gave a well written report to the panel.
- She gave a well-written report to the panel.
- She gave a wellwritten report to the panel.
- She gave a well, written report to the panel.
Correct answer: She gave a well-written report to the panel.
The correct sentence is "She gave a well-written report to the panel." Two words acting together as a single modifier before a noun are joined with a hyphen, forming "well-written." Leaving out the hyphen, joining the words, or inserting a comma fails to link the compound modifier properly.
- Which sentence is written in the active voice rather than the passive voice?
- The medication was administered by the nurse.
- The nurse administered the medication.
- The medication had been administered.
- The medication was being administered carefully.
Correct answer: The nurse administered the medication.
The active-voice sentence is "The nurse administered the medication." The subject "nurse" performs the action directly on the object "medication." The other versions place the receiver of the action in the subject position and use a form of "to be" with the past participle, which signals passive voice.
- Which sentence keeps its items in parallel grammatical form?
- The aide enjoys charting, lifting, and to organize supplies.
- The aide enjoys to chart, lifting, and organizing supplies.
- The aide enjoys charting, lifting, and organizing supplies.
- The aide enjoys charting, to lift, and organizing supplies.
Correct answer: The aide enjoys charting, lifting, and organizing supplies.
The correct sentence is "The aide enjoys charting, lifting, and organizing supplies." All three items in the list use the same -ing form, keeping them parallel. The other versions mix the -ing form with an infinitive like "to organize," breaking the parallel structure.
- Which sentence uses the correct comparative or superlative form?
- Of the two thermometers, this one is the most accurate.
- Of the two thermometers, this one is more accurate.
- Of the two thermometers, this one is accuratest.
- Of the two thermometers, this one is most accurate.
Correct answer: Of the two thermometers, this one is more accurate.
The correct sentence is "Of the two thermometers, this one is more accurate." When comparing exactly two things, the comparative form "more accurate" is used. The superlative "most accurate" applies only to three or more items, and "accuratest" is not a standard word.
- Which sentence avoids a double negative?
- The patient did not have no complaints.
- The patient did not have any complaints.
- The patient didn't have no complaints.
- The patient hadn't no complaints.
Correct answer: The patient did not have any complaints.
The correct sentence is "The patient did not have any complaints." Pairing "not" with "any" expresses a single, clear negative. The other versions combine "not" with "no," creating a double negative that is nonstandard in formal English.
- Which sentence correctly capitalizes a professional title used directly before a name?
- The patient spoke with doctor Lee about the results.
- The patient spoke with Doctor Lee about the results.
- The patient spoke with Doctor lee about the results.
- The patient spoke with the Doctor Lee about the results.
Correct answer: The patient spoke with Doctor Lee about the results.
The correct sentence is "The patient spoke with Doctor Lee about the results." A title used as part of a name directly before it is capitalized, and the surname "Lee" is also capitalized. Lowercasing the title or the name, or adding "the" before the titled name, is incorrect.
- Which revision states the idea most concisely without changing the meaning?
- Due to the fact that the room was full, we waited.
- Because the room was full, we waited.
- On account of the fact the room was full, we waited.
- In view of the fact that the room was full, we waited.
Correct answer: Because the room was full, we waited.
The most concise revision is "Because the room was full, we waited." A single word, "because," replaces wordy phrases that carry the same meaning. The other versions use padded expressions like "due to the fact that" that add length without adding information.
- Which sentence corrects the faulty parallel structure in "The role requires patience, skill, and being dependable"?
- The role requires patience, skill, and dependability.
- The role requires patience, to be skilled, and being dependable.
- The role requires being patient, skill, and being dependable.
- The role requires patience, skill, and to be dependable.
Correct answer: The role requires patience, skill, and dependability.
The correct revision is "The role requires patience, skill, and dependability." All three items are now nouns, making the list parallel. The other versions mix nouns with phrases like "being dependable" or "to be dependable," which breaks the parallel form.
- Which sentence uses the correct article before the noun?
- The patient waited for a hour in the lobby.
- The patient waited for an hour in the lobby.
- The patient waited for an hours in the lobby.
- The patient waited for a hours in the lobby.
Correct answer: The patient waited for an hour in the lobby.
The correct sentence is "The patient waited for an hour in the lobby." The article "an" is used before a word that begins with a vowel sound, and "hour" starts with a silent "h." Using "a" ignores the vowel sound, and "hours" wrongly makes a single time period plural.
- Which sentence chooses the correct verb form to follow the helping verb?
- The samples should have went to the lab already.
- The samples should have gone to the lab already.
- The samples should have going to the lab already.
- The samples should have goes to the lab already.
Correct answer: The samples should have gone to the lab already.
The correct sentence is "The samples should have gone to the lab already." After "have," the past participle "gone" is required. The simple past "went," the -ing form "going," and the present "goes" do not work as the participle in this verb phrase.
- Which sentence uses an adverb correctly to modify the verb?
- The student answered the questions quick.
- The student answered the questions quickly.
- The student answered the questions quicker than quick.
- The student answered the questions quickest.
Correct answer: The student answered the questions quickly.
The correct sentence is "The student answered the questions quickly." The adverb "quickly" describes how the action of answering was done. The adjective "quick" cannot modify a verb, and the comparative or superlative forms do not fit a sentence with no comparison.
- Which sentence corrects the shift in person in "When a student studies daily, you tend to feel more prepared"?
- When a student studies daily, they tend to feel more prepared.
- When you study daily, the student tends to feel more prepared.
- When a student studies daily, you study harder too.
- When a student studies daily, that student tends to feel more prepared.
Correct answer: When a student studies daily, that student tends to feel more prepared.
The correct sentence is "When a student studies daily, that student tends to feel more prepared." Keeping the third-person "student" throughout fixes the unnecessary shift to the second-person "you." The other versions either switch persons or keep the inconsistent "you" alongside "student."
- Most reactions in the body, such as breaking down food, are sped up by special proteins that are not used up in the process. These biological catalysts are called:
- Enzymes
- Hormones
- Antibodies
- Vitamins
Correct answer: Enzymes
Enzymes are the answer. They are protein catalysts that lower the energy needed for a reaction, speeding it up without being consumed. Hormones are chemical messengers, antibodies fight pathogens, and vitamins are nutrients that may assist enzymes but are not catalysts themselves.
- Each enzyme works best within a narrow range of temperature and pH. If conditions become too hot or too acidic, the enzyme loses its shape and stops working. This loss of shape and function is called:
- Denaturation
- Replication
- Hydrolysis
- Diffusion
Correct answer: Denaturation
Denaturation is correct. Extreme temperature or pH unfolds an enzyme's three-dimensional structure, destroying the active site so it can no longer bind its substrate. Replication copies DNA, hydrolysis splits molecules with water, and diffusion is the spreading of particles.
- During cellular respiration, body cells break down glucose using oxygen to release usable energy. This energy is captured in the form of a molecule abbreviated as:
Correct answer: ATP
ATP is correct. Adenosine triphosphate is the cell's main energy currency produced by cellular respiration, and cells spend it to power their activities. DNA and RNA carry genetic information, and NaCl is table salt, an electrolyte rather than an energy molecule.
- A muscle cell that lacks adequate oxygen during heavy exercise can still produce a small amount of energy by breaking down glucose without oxygen. This oxygen-free pathway is best described as:
- Anaerobic respiration
- Aerobic respiration
- Photosynthesis
- Active transport
Correct answer: Anaerobic respiration
Anaerobic respiration is correct because it generates energy from glucose without using oxygen, often producing lactic acid in muscle. Aerobic respiration requires oxygen, photosynthesis occurs in plants to make glucose, and active transport moves substances across membranes using energy.
- Body cells need to replace worn-out cells with identical copies for growth and repair. The type of cell division that produces two genetically identical daughter cells is called:
- Mitosis
- Meiosis
- Fertilization
- Digestion
Correct answer: Mitosis
Mitosis is the answer. It divides one cell into two identical daughter cells with the full chromosome number, supporting growth and tissue repair. Meiosis produces sex cells with half the chromosomes, fertilization joins sex cells, and digestion breaks down food.
- In a molecule of DNA, the two strands are held together by pairs of bases. Adenine always pairs with thymine, and cytosine always pairs with:
- Guanine
- Uracil
- Adenine
- Thymine
Correct answer: Guanine
Guanine is correct. In DNA the complementary base-pairing rule joins cytosine with guanine and adenine with thymine. Uracil replaces thymine only in RNA, and adenine and thymine pair with each other rather than with cytosine.
- A child inherits one allele for a trait from each parent. If a dominant allele is present, it masks the effect of a recessive allele. The actual genetic makeup an individual carries for a trait, such as having two different alleles, is called the:
- Genotype
- Phenotype
- Gamete
- Chromosome
Correct answer: Genotype
Genotype is correct because it refers to the specific alleles an organism carries for a trait. The phenotype is the observable physical expression of those genes, a gamete is a sex cell, and a chromosome is the structure that holds many genes.
- The skeletal system does more than support the body. The soft tissue inside the cavities of certain bones is also where most new blood cells are produced. This tissue is called:
- Bone marrow
- Cartilage
- Tendon
- Ligament
Correct answer: Bone marrow
Bone marrow is the answer. Red bone marrow inside the bones produces red blood cells, white blood cells, and platelets. Cartilage cushions joints, tendons attach muscle to bone, and ligaments connect bone to bone.
- Muscle that is found in the walls of the stomach, intestines, and blood vessels, works automatically without conscious control, is best classified as:
- Smooth muscle
- Skeletal muscle
- Cardiac muscle
- Voluntary muscle
Correct answer: Smooth muscle
Smooth muscle is correct because it lines hollow internal organs and blood vessels and contracts involuntarily. Skeletal muscle attaches to bones and is under voluntary control, cardiac muscle is found only in the heart, and voluntary muscle describes skeletal muscle.
