Question

Photophosphorylation that produces only ATP but not NADPH occurs in:

• A. Non-cyclic photophosphorylation
• B. Cyclic photophosphorylation
• C. Calvin cycle
• D. C4 cycle

Answer 1

Answer:

B. Cyclic photophosphorylation

• Cyclic photophosphorylation involves only Photosystem I, where excited electrons cycle back through an electron transport chain to generate ATP via chemiosmosis, without producing NADPH or splitting water.