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Cyclic photophosphorylation differs from non-cyclic in that it
Auses only PS I; makes ATP, no NADPH, no O₂
Buses only PS II and makes only NADPH
Cuses both photosystems but makes no ATP
Dproduces glucose directly
Answer & Solution
Correct answer: A. uses only PS I; makes ATP, no NADPH, no O₂
In cyclic photophosphorylation, electrons leave PS I, flow through the ETC, and return to PS I; only ATP is made. PS II is not involved, so water is NOT split and NO O₂ is released, and no NADPH. Non-cyclic makes both ATP and NADPH and releases O₂.
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