MDCAT Biology MCQ #352

A chloroplast has a high ATP demand but a very low concentration of NADP+. Which pathway will the electrons most likely take?

MDCAT Biology MCQ #352

  1. Question 1

    Q1. A chloroplast has a high ATP demand but a very low concentration of NADP+. Which pathway will the electrons most likely take?

    • A) Cyclic photophosphorylation
    • B) Non-cyclic photophosphorylation
    • C) Photorespiration
    • D) Lactic acid fermentation

    Answer: Cyclic photophosphorylation

    Explanation: Cyclic photophosphorylation occurs when NADP+ levels are low to generate ATP only. Non-cyclic flow fails because it requires NADP+ as an acceptor.