The product of cyclic phosphorylation is
Correct answer: A. ATP
- A. ATP
- B. NADPH
- C. ATP and NADPH
- D. ATP and oxygen
Explanation
ATP is the correct option because cyclic phosphorylation involves electrons moving in a circular path from chlorophyll through the electron transport chain and back to the same chlorophyll molecule, creating a proton gradient that drives ATP synthase to produce ATP.ATP and oxygen are incorrect because cyclic phosphorylation does not involve the splitting of water, so no oxygen is released.ATP and NADPH are incorrect because in cyclic phosphorylation, electrons return to chlorophyll instead of reducing NADP⁺, so NADPH is not produced.NADPH is incorrect because the process does not reduce NADP⁺ at all, and the main product is ATP generated through the proton gradient.
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About Bioenergetics
Cellular respiration explains how cells release energy from glucose through glycolysis, the link reaction, Krebs cycle and electron transport chain. It includes ATP production, substrate-level and oxidative phosphorylation, aerobic versus anaerobic respiration, and the roles of mitochondria, oxygen and fermentation in energy transfer.
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