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    Question

    The following are the steps of chemiosmotic ATP synthesis in the light reaction. Arrange them in correct order of their occurence-

    (A) H diffuse through ATP synthetase and it makes ATP

    (B) Electrons from PS-Il pass along electron transport chan

    (C) H concentration gradient generates across the membrane

    (D) Light excites electrons in PS-II

    Choose the correct answer from the options given below

    A (A), (B), (C), (D) Correct Answer Incorrect Answer
    B (D), (B), (C), (A) Correct Answer Incorrect Answer
    C (B), (A), (D), (C) Correct Answer Incorrect Answer
    D (C), (B), (D), (A) Correct Answer Incorrect Answer

    Solution

    The sequence for chemiosmotic ATP synthesis is: (D) Light excites electrons in PS-II. (B) Electrons from PS-II pass along the electron transport chain. (C) A H+ concentration gradient is generated across the membrane. (A) H+ diffuse through ATP synthase, which makes ATP.

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