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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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