Physics for Life Sciences MCQs

1. What is the primary function of DNA in living organisms? A) Energy production B) Genetic information storage C) Cellular respiration D) Protein synthesis Answer: B) Genetic information storage 2. What is the SI unit of electric charge? A) Ampere B) Volt C) Coulomb D) Ohm Answer: C) Coulomb 3. Which of the following describes a characteristic of osmosis? A) Movement of water from a region of lower solute concentration to higher solute concentration B) Movement of solute molecules from a region of higher concentration to lower concentration C) Movement of water across a semipermeable membrane to equalize concentration D) Movement of solute molecules across a semipermeable membrane against a concentration gradient Answer: C) Movement of water across a semipermeable membrane to equalize concentration 4. In which cellular organelle does aerobic respiration primarily occur? A) Nucleus B) Mitochondrion C) Golgi apparatus D) Endoplasmic reticulum Answer: B) Mitochondrion 5. What is the primary function of red blood cells in the human body? A) Oxygen transport B) Hormone production C) Digestion D) Immune response Answer: A) Oxygen transport 6. What is the SI unit of force? A) Newton B) Joule C) Watt D) Pascal Answer: A) Newton 7. Which of the following best describes the process of mitosis? A) Division of a cell into two identical daughter cells B) Exchange of genetic material between homologous chromosomes C) Formation of gametes D) Replication of DNA Answer: A) Division of a cell into two identical daughter cells 8. What is the law of conservation of energy? A) Energy cannot be created or destroyed, only transformed from one form to another. B) Energy can be created but cannot be destroyed. C) Energy can be destroyed but cannot be created. D) None of the above. Answer: A) Energy cannot be created or destroyed, only transformed from one form to another. 9. Which of the following is a characteristic of a buffer solution? A) It resists changes in pH when small amounts of acid or base are added. B) It rapidly changes pH in response to acid or base additions. C) It maintains a constant pH of 7 regardless of acid or base concentration. D) It only works in strongly acidic solutions. Answer: A) It resists changes in pH when small amounts of acid or base are added. 10. What is the function of enzymes in biological systems? A) Energy production B) Structural support C) Catalyzing biochemical reactions D) Oxygen transport Answer: C) Catalyzing biochemical reactions 11. What is the SI unit of electrical resistance? A) Ohm B) Ampere C) Volt D) Watt Answer: A) Ohm 12. Which of the following is an example of an exothermic reaction? A) Photosynthesis B) Cellular respiration C) Combustion D) Melting of ice Answer: C) Combustion 13. What is the formula for calculating work done in a system? A) Work = Force × Distance B) Work = Mass × Acceleration C) Work = Energy × Time D) Work = Power × Time Answer: A) Work = Force × Distance 14. What is the primary function of chlorophyll in plants? A) Oxygen transport B) Energy storage C) Photosynthesis D) Cell division Answer: C) Photosynthesis 15. Which of the following best describes the structure of an atom? A) Protons and electrons are located in the nucleus, while neutrons orbit around them. B) Neutrons and electrons are located in the nucleus, while protons orbit around them. C) Electrons are located in the nucleus, while protons and neutrons orbit around them. D) Protons and neutrons are located in the nucleus, while electrons orbit around them. Answer: D) Protons and neutrons are located in the nucleus, while electrons orbit around them. 16. What is the SI unit of power? A) Watt B) Joule C) Volt D) Ampere Answer: A) Watt 17. Which of the following statements is true about diffusion? A) It is the movement of water across a semipermeable membrane. B) It is the movement of molecules from an area of higher concentration to lower concentration. C) It requires energy input from cells. D) It is a form of active transport. Answer: B) It is the movement of molecules from an area of higher concentration to lower concentration. 18. What is the role of ribosomes in cells? A) Energy production B) Protein synthesis C) DNA replication D) Cell division Answer: B) Protein synthesis 19. What is the formula for calculating the speed of an object? A) Speed = Distance × Time B) Speed = Distance ÷ Time C) Speed = Time ÷ Distance D) Speed = Force × Time Answer: B) Speed = Distance ÷ Time 20. Which of the following is an example of a renewable energy source? A) Fossil fuels B) Nuclear energy C) Solar power D) Natural gas Answer: C) Solar power 21. What is the SI unit of frequency? A) Hertz B) Joule C) Watt D) Pascal Answer: A) Hertz 22. Which of the following best describes the function of RNA? A) Storage of genetic information B) Energy production C) Protein synthesis D) Cellular respiration Answer: C) Protein synthesis 23. What is the formula for calculating the density of an object? A) Density = Mass ÷ Volume B) Density = Volume ÷ Mass C) Density = Mass × Volume D) Density = Mass + Volume Answer: A) Density = Mass ÷ Volume 24. Which of the following is a characteristic of a gas? A) Definite shape and volume B) Definite shape but no definite volume C) No definite shape or volume D) Definite volume but no definite shape Answer: C) No definite shape or volume

Physics for Life Sciences MCQs

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