During cyclic photophosphorylation, electrons pass from all except:

Correct answer: C. Photosystem II

  • A. Photosystem I
  • B. Ferredoxin
  • C. Photosystem II
  • D. Cytochrome complex

Explanation

In cyclic photophosphorylation, electrons are cycled back to Photosystem I after passing through components such as ferredoxin and the cytochrome complex. Photosystem II is excluded from this pathway because it is involved in non-cyclic photophosphorylation, where it initiates the process by splitting water molecules. Therefore, the correct answer is photosystem II, as it does not participate in the cyclic electron flow.

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