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← Nature & AnimalsWhich outcome occurs when cyclic electron flow predominates in a plant's thylakoid membranes?
A)Increased ATP production without NADPH✓
B)Enhanced carbon fixation via the Calvin cycle
C)Elevated oxygen release from water lysis
D)Decreased susceptibility to photoinhibition
💡 Explanation
When cyclic electron flow predominates, electrons cycle back to photosystem I, stimulating proton gradient formation, thereby increasing ATP production through chemiosmosis, because electrons do not pass through NADP+ reductase to generate NADPH. Therefore, increased ATP production results, rather than other outputs requiring both ATP and NADPH from non-cyclic electron flow.
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