Q1. Which pigment absorbs light most efficiently for photosynthesis?A. Chlorophyll aB. CarotenoidsC. XanthophyllsD. Chlorophyll b
Q2. Which of the following statements about the light-dependent reactions is correct?A. They occur in the stroma of the chloroplast.B. Oxygen is released as a by-product.C. They produce glucose directly.D. Carbon dioxide is fixed during this phase.
Q3. Which scientist demonstrated the role of green plants in purifying air?A. Joseph PriestleyB. T.W. EngelmannC. Cornelius van NielD. Jan Ingenhousz
Q4. Which enzyme catalyzes the first step of carbon fixation in the Calvin cycle?A. PEP carboxylaseB. RuBisCOC. ATP synthaseD. NADP reductase
Q5. Which component of the light reaction transfers electrons to NADP⁺?A. PSIIB. ATP synthaseC. PSID. Plastoquinone
Q6. Which organelle is the site of the light-dependent reactions of photosynthesis?A. MitochondriaB. CytoplasmC. ChloroplastD. Peroxisome
Q7. Which of the following is an incorrect statement about the Calvin cycle?A. It takes place in the stroma of the chloroplast.B. RuBisCO plays a crucial role in carbon fixation.C. ATP and NADPH produced in light reactions are used here.D. It directly produces oxygen as a by-product.
Q8. Which of the following statements about non-cyclic photophosphorylation is correct?A. It only involves Photosystem I.B. It results in the production of ATP and NADPH.C. It does not produce oxygen.D. Electrons return to the same photosystem.
Q9. What is the primary function of NADPH in photosynthesis?A. Acts as an electron donor in the Calvin cycleB. Stores light energyC. Synthesizes ATPD. Releases oxygen
Q10. Which enzyme is responsible for splitting water during photosynthesis?A. RuBisCOB. ATP synthaseC. PEP carboxylaseD. Oxygen-evolving complex