MDCAT Biology MCQ #181

A chloroplast is observed to produce ATP without the evolution of oxygen or the reduction of NADP+. Which specific pathway is likely active?

MDCAT Biology MCQ #181

  1. Question 1

    Q1. A chloroplast is observed to produce ATP without the evolution of oxygen or the reduction of NADP+. Which specific pathway is likely active?

    • A) Non-cyclic photophosphorylation
    • B) Cyclic photophosphorylation
    • C) Calvin cycle
    • D) Photorespiration

    Answer: Cyclic photophosphorylation

    Explanation: Cyclic flow occurs when ATP demand is high but NADPH levels are sufficient, bypassing PSII and the water-splitting complex.