Q1. What is the primary function of Photosystem II in photosynthesis?A. ATP synthesisB. NADPH formationC. Splitting of water to release oxygenD. Fixation of CO₂
Q2. What is the primary function of the proton gradient in photosynthesis?A. ATP synthesisB. Glucose formationC. NADPH reductionD. Oxygen evolution
Q3. Which of the following statements about the Z-scheme of electron transport is correct?A. Electrons flow from NADPH to water.B. It involves both Photosystem I and II.C. Oxygen is not released during this process.D. ATP is not generated in this process.
Q5. Which factor has the most significant effect on the rate of photosynthesis in nature?A. Oxygen availabilityB. Carbon dioxide concentrationC. Glucose availabilityD. Chlorophyll concentration
Q6. What is the primary role of plastocyanin in the electron transport chain?A. Transports electrons from PSII to PSIB. Pumps protons into the lumenC. Synthesizes ATPD. Fixes CO₂ in the Calvin cycle
Q7. Why do CAM plants keep their stomata closed during the day?A. To prevent oxygen lossB. To reduce transpirationC. To increase CO₂ uptakeD. To perform photorespiration
Q8. In CAM plants, carbon dioxide is fixed:A. During the dayB. At nightC. Only in the morningD. In bundle sheath cells
Q9. Which compound is transported from the mesophyll to the bundle sheath cells in the C₄ pathway?A. PGAB. MalateC. G3PD. RuBP
Q10. Which of the following correctly describes the role of NADPH in photosynthesis?A. It captures light energy.B. It acts as a reducing agent in the Calvin cycle.C. It splits water molecules.D. It synthesizes ATP directly.