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Cyclic photophosphorylation results in the formation of

1. ATP and NADPH
2. ATP, NADPH and O₂
3. ATP
4. NADPH

Correct answer: ATP

Solution

In cyclic photophosphorylation, excited electrons from photosystem I cycle back to the electron transport chain instead of reducing NADP+. Because water is not split, neither NADPH nor O₂ is produced, so the only product is ATP.

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