MDCAT Biology MCQ #254

In certain conditions, plants switch to cyclic electron flow involving only Photosystem I. What is the sole energy product of this pathway?

MDCAT Biology MCQ #254

  1. Question 1

    Q1. In certain conditions, plants switch to cyclic electron flow involving only Photosystem I. What is the sole energy product of this pathway?

    • A) ATP only
    • B) NADPH only
    • C) ATP and NADPH
    • D) ATP and Oxygen

    Answer: ATP only

    Explanation: Cyclic photophosphorylation only produces ATP. NADPH and oxygen are only produced during the non-cyclic (Z-scheme) electron flow.