Question

Which of the following statements is incorrect

• A. Cyclic photophosphorylation involves both PS I and PS II.
• B. Both ATP and NADPH+H+ are synthesized during non-cyclic photophosphorylation
• C. Stroma lamellae have PS I only and lack NADP reductase
• D. Grana lamellae have both PS I and PS II

Answer 1

Answer: (A)

Cyclic photophosphorylation involves both PS I and PS II.

Answer 2

Cyclic photophosphorylation actually involves only Photosystem I (PS I), not both PS I and PS II. In cyclic photophosphorylation, electrons are cyclically passed through PS I to generate ATP without the production of NADPH. PS II is not involved in this process.

So, the correct option is (A): Cyclic photophosphorylation involves both PS I and PS II.