Praxis Fundamental Subjects CK (5511) Domain 4: Science Welcome to your Praxis Fundamental Subjects CK (5511) Domain 4: Science 1. Praxis Fundamental Subjects: Science What is the primary function of ribosomes in a cell? A. To produce lipids and steroids. B. To synthesize proteins. C. To generate cellular energy. D. To store genetic information. None 2. Praxis Fundamental Subjects: Science In the context of ecological relationships, what does the term "mutualism" refer to? A. A relationship where both species benefit. B. A relationship where one species benefits and the other is harmed. C. A relationship where one species benefits without affecting the other. D. A relationship where both species are harmed. None 3. Praxis Fundamental Subjects: Science Which gas is most responsible for the greenhouse effect on Earth? A. Oxygen B. Nitrogen C. Carbon Dioxide D. Methane None 4. Praxis Fundamental Subjects: Science What is the primary cause of tides on Earth? A. The rotation of the Earth on its axis. B. The gravitational pull of the Sun. C. The gravitational pull of the Moon. D. Atmospheric pressure variations. None 5. Praxis Fundamental Subjects: Science In genetics, what is the function of a promoter? A. To enhance gene expression. B. To replicate DNA. C. To initiate transcription. D. To terminate transcription. None 6. Praxis Fundamental Subjects: Science What is the principle behind the Doppler effect in physics? A. The change in frequency of a wave in relation to an observer who is moving relative to the wave source. B. The increase in wave amplitude when two waves meet. C. The decrease in wave speed upon entering a denser medium. D. The bending of light around objects. None 7. Praxis Fundamental Subjects: Science What process describes the movement of water from the Earth's surface to the atmosphere and back? A. Transpiration B. Evaporation C. Condensation D. The water cycle None 8. Praxis Fundamental Subjects: Science In the context of plate tectonics, what is subduction? A. The process where one tectonic plate slides beneath another. B. The creation of new crust at divergent boundaries. C. The horizontal movement of plates past each other. D. The upward movement of mantle material to form new crust. None 9. Praxis Fundamental Subjects: Science What is the primary function of white blood cells in the human body? A. To transport oxygen. B. To clot blood. C. To fight infections. D. To regulate blood sugar. None 10. Praxis Fundamental Subjects: Science Which part of the brain is primarily responsible for regulating balance and coordination? A. Cerebrum B. Cerebellum C. Brainstem D. Hypothalamus None 11. Praxis Fundamental Subjects: Science In chemistry, what is the principle of Le Chatelier's Law? A. A reaction in equilibrium will adjust concentrations to counter changes. B. The rate of a reaction is directly proportional to the concentration of reactants. C. Gases always mix completely in a closed container. D. The pressure of a gas is directly proportional to its temperature. None 12. Praxis Fundamental Subjects: Science What is the primary mechanism by which heat is transferred in fluids? A. Radiation B. Conduction C. Convection D. Evaporation None 13. Praxis Fundamental Subjects: Science Which of the following elements is a liquid at room temperature? A. Mercury B. Iron C. Carbon D. Nitrogen None 14. Praxis Fundamental Subjects: Science What is the primary product of the Calvin Cycle in photosynthesis? A. Oxygen B. Glucose C. ATP D. NADPH None 15. Praxis Fundamental Subjects: Science In astronomy, what is a quasar? A. A rapidly rotating neutron star. B. A region of intense star formation. C. A highly luminous and active galactic nucleus. D. A small, icy body in the outer solar system. None 16. Praxis Fundamental Subjects: Science What principle explains the buoyant force experienced by an object submerged in a fluid? A. Newton's Third Law B. Bernoulli's Principle C. Archimedes' Principle D. Pascal's Law None 17. Praxis Fundamental Subjects: Science What type of bond is formed when electrons are shared unequally between atoms? A. Ionic bond B. Covalent bond C. Polar covalent bond D. Metallic bond None 18. Praxis Fundamental Subjects: Science In the field of geology, what is the Mohorovi?i? discontinuity (Moho)? A. The boundary between Earth's crust and mantle. B. The core-mantle boundary. C. The division between the lithosphere and asthenosphere. D. The interface between continental and oceanic crust. None 19. Praxis Fundamental Subjects: Science Which hormone regulates the body's metabolism? A. Insulin B. Testosterone C. Thyroxine D. Estrogen None 20. Praxis Fundamental Subjects: Science In physics, what phenomenon explains the bending of light waves as they pass from one medium to another? A. Reflection B. Refraction C. Diffraction D. Interference None 21. Praxis Fundamental Subjects: Science What is the primary component of the Sun's core where nuclear fusion occurs? A. Helium B. Iron C. Hydrogen D. Oxygen None 22. Praxis Fundamental Subjects: Science In ecology, what does the term "keystone species" refer to? A. A species that is the most numerous in an ecosystem. B. A species that has no natural predators. C. A species whose presence and role within an ecosystem have a disproportionate effect on other species within the ecosystem. D. A species that has recently been introduced to an ecosystem. None 23. Praxis Fundamental Subjects: Science In the field of genetics, what is the main purpose of gel electrophoresis? A. To amplify DNA sequences. B. To cut DNA into smaller fragments. C. To separate DNA fragments based on size. D. To combine DNA from different organisms. None 24. Praxis Fundamental Subjects: Science In chemistry, what is the primary characteristic of a buffer solution? A. It changes color in the presence of acids or bases. B. It maintains a constant pH when acids or bases are added. C. It conducts electricity better than pure water. D. It reacts vigorously with metals. None 25. Praxis Fundamental Subjects: Science What phenomenon occurs when a photon is emitted as a result of an electron transitioning from a higher to a lower energy level? A. Absorption B. Ionization C. Excitation D. Emission None 26. Praxis Fundamental Subjects: Science In the context of plate tectonics, what is a transform boundary? A. Where two plates collide and one is forced beneath the other. B. Where two plates move apart from each other. C. Where two plates slide horizontally past each other. D. Where new crust is formed by volcanic activity. None 27. Praxis Fundamental Subjects: Science What is the primary process by which stars, including the Sun, produce energy? A. Chemical combustion B. Nuclear fission C. Nuclear fusion D. Gravitational contraction None 28. Praxis Fundamental Subjects: Science In the carbon cycle, what process removes carbon dioxide from the atmosphere? A. Respiration B. Fossil fuel combustion C. Photosynthesis D. Decomposition None 29. Praxis Fundamental Subjects: Science What term describes the total genetic diversity found within a population or a species? A. Gene pool B. Genotype C. Phenotype D. Allele frequency None 30. Praxis Fundamental Subjects: Science In physics, what is the principle of superposition? A. The displacement of a medium caused by two or more waves is the algebraic sum of the displacements caused by the individual waves. B. The velocity of a wave is determined by its frequency and wavelength. C. The energy of a photon is directly proportional to its frequency. D. The pressure exerted by a fluid in a closed system is transmitted equally in all directions. None 1 out of 30 Time is Up! Time's up
