Q1. Which of the following is a product of the Calvin cycle?A. NADPHB. OxygenC. G3P (Glyceraldehyde-3-phosphate)D. Water
Q2. What is the role of ATP and NADPH in the Calvin cycle?A. ATP provides energy, and NADPH provides reducing powerB. Both are used for carbon fixationC. Both help in the release of oxygenD. ATP reduces NADP⁺
Q3. Which of the following statements about CAM plants is true?A. They fix CO₂ at night and perform the Calvin cycle during the dayB. They lack RuBisCOC. They have the same photosynthetic pathway as C₄ plantsD. They perform photosynthesis only in mesophyll cells
Q4. What is the role of PEP carboxylase in C₄ plants?A. Fixes CO₂ in mesophyll cellsB. Reduces NADP⁺C. Synthesizes ATPD. Breaks down malate
Q5. Which of the following is an incorrect statement about the Calvin cycle?A. It takes place in the stroma.B. RuBP captures carbon dioxide.C. It produces glucose directly.D. ATP and NADPH are required for the cycle.
Q6. What is the main function of NADP+ in photosynthesis?A. Captures light energyB. Acts as the final electron acceptor in the light reactionsC. Fixes carbon dioxide in the Calvin cycleD. Synthesizes ATP
Q7. Which product of the light-dependent reactions is directly used in the Calvin cycle?A. OxygenB. NADPHC. WaterD. ATP synthase
Q8. Which of the following statements about the light-harvesting complex (LHC) is correct?A. LHC consists only of chlorophyll a molecules.B. LHC captures and transfers light energy to reaction centers.C. LHC directly participates in carbon fixation.D. LHC functions only during the Calvin cycle.
Q9. Which of the following correctly describes the role of ATP synthase in photosynthesis?A. It captures carbon dioxide.B. It breaks down glucose into pyruvate.C. It synthesizes ATP using a proton gradient.D. It reduces NADP+ to NADPH.
Q10. Which of the following statements about RuBisCO is correct?A. It is found only in C₄ plantsB. It catalyzes both carboxylation and oxygenationC. It functions only in the light-dependent reactionsD. It directly generates ATP