Multiple choice

Which of the following occurs both during cyclic and non-cyclic modes of photophosphorylation?

  1. Formation of ATP

  2. Release of O2

  3. Formation of NADPH

  4. Involvement of both PS-I and PS-II
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A Correct answer
Explanation

Both cyclic and non-cyclic photophosphorylation produce ATP. However, only non-cyclic photophosphorylation produces NADPH and releases oxygen (involving both Photosystem I and II). Cyclic photophosphorylation only involves Photosystem I and generates ATP without producing NADPH or oxygen.

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