Q2. Which molecule acts as the primary acceptor of CO2 in C3 plants?A. PEP (Phosphoenolpyruvate)B. RuBP (Ribulose-1,5-bisphosphate)C. Oxaloacetic acid (OAA)D. 3-PGA (3-phosphoglyceric acid)
Q3. Which of the following conditions would minimize photorespiration in plants?A. High oxygen concentrationB. Low carbon dioxide concentrationC. High carbon dioxide concentrationD. High temperature
Q4. Which of the following statements about CAM plants is correct?A. They perform light-dependent reactions at nightB. They store CO₂ in the form of organic acids at nightC. They have Kranz anatomyD. They use RuBisCO to fix CO₂ at night
Q5. In the Calvin cycle, which molecule acts as the primary acceptor of carbon dioxide?A. 3-PGAB. RuBP (Ribulose-1,5-bisphosphate)C. PEPD. Oxaloacetic acid
Q6. What is the final electron acceptor in the light-dependent reactions of photosynthesis?A. OxygenB. RuBPC. NADP+D. Water
Q7. What is the primary difference between cyclic and non-cyclic photophosphorylation?A. Only non-cyclic photophosphorylation produces ATPB. Cyclic photophosphorylation produces both ATP and NADPHC. Only non-cyclic photophosphorylation involves both PSII and PSID. Cyclic photophosphorylation generates oxygen
Q8. Which of the following statements about Photosystem II (PSII) is correct?A. PSII absorbs light at 700 nm wavelength.B. Photolysis of water occurs in PSII.C. PSII transfers electrons directly to NADP+.D. Oxygen is not released in PSII.
Q9. Which of the following steps is NOT part of the light-dependent reactions?A. Splitting of waterB. Oxygen evolutionC. Fixation of CO₂D. ATP synthesis
Q10. Which of the following statements about CAM plants is incorrect?A. They open their stomata at night.B. They store CO2 as organic acids.C. They carry out the Calvin cycle at night.D. They minimize water loss by separating carbon fixation and the Calvin cycle in time.