MDCAT Biology MCQ #445

In the Calvin cycle, both ATP and NADPH are consumed. What is the specific role of NADPH that distinguishes it from ATP?

MDCAT Biology MCQ #445

  1. Question 1

    Q1. In the Calvin cycle, both ATP and NADPH are consumed. What is the specific role of NADPH that distinguishes it from ATP?

    • A) Acting as the primary carbon source for sugar synthesis
    • B) Providing the reducing power to convert 3-PGA to G3P
    • C) Regenerating RuBP from G3P molecules in the stroma
    • D) Absorbing photons to excite electrons in the reaction center

    Answer: Providing the reducing power to convert 3-PGA to G3P

    Explanation: NADPH provides the reducing power (electrons) for carbon fixation, while ATP provides the chemical energy required for the endergonic reactions.