Q1. What is the role of cytochrome b6f complex in the electron transport chain?A. Transfers electrons from PSII to plastocyaninB. Fixes CO₂C. Synthesizes ATPD. Reduces NADP⁺
Q2. Why do C₄ plants have a higher productivity compared to C₃ plants?A. They lack RuBisCOB. They use only cyclic photophosphorylationC. They have a mechanism to minimize photorespirationD. They perform photosynthesis only at night
Q3. Which of the following statements about C4 plants is correct?A. Carbon fixation occurs in bundle sheath cells.B. The first stable product is a three-carbon compound.C. PEP carboxylase efficiently captures carbon dioxide.D. C4 plants are less efficient in hot and dry environments.
Q4. What is the immediate product of photolysis of water in photosynthesis?A. O₂, ATP, and NADPHB. O₂, protons (H⁺), and electronsC. CO₂ and waterD. Glucose and oxygen
Q5. Which of the following statements about CAM plants is correct?A. They open their stomata during the day.B. They store carbon dioxide as organic acids at night.C. They fix carbon dioxide using RuBisCO at night.D. They perform the Calvin cycle only at night.
Q6. Which of the following statements about the role of water in photosynthesis is correct?A. Water acts as the primary electron donor.B. Water directly fixes carbon dioxide.C. Water is a product of the Calvin cycle.D. Water captures light energy for the light reaction.
Q7. Which molecule is the final electron acceptor in the light-dependent reactions of photosynthesis?A. OxygenB. RuBPC. NADP+D. Water
Q8. Which of the following statements is true about NADP reductase?A. It is found in the thylakoid membraneB. It reduces NADP⁺ to NADPHC. It receives electrons from ferredoxinD. All of the above
Q9. Which of the following statements about cyclic photophosphorylation is true?A. It involves both Photosystem I and II.B. It produces both ATP and NADPH.C. It releases oxygen as a byproduct.D. It only produces ATP.
Q10. Which of the following wavelengths of light is least effective for photosynthesis?A. RedB. BlueC. GreenD. Violet