JCECE Medical JCECE Medical Solved Paper-2012

  • question_answer
    The mechanism of ATP formation both in chloroplast and mitochondria is explained by

    A)  relay pump theory of Godlewski

    B)  Cholodny-Wents model

    C)  chemiosmotic theory

    D)  Munchs mass-flow hypothesis

    Correct Answer: C

    Solution :

     As per Peter Mitehells chemiosmotic coupling hypothesis, outward pumping of protons across the inner chloroplast or mitochondrial membrane results in accumuiatjon of protons between outer membrane and inner membrane. A proton gradient is thus, established. As protons now flow back passively down the gradient the proton motive force thus, developed is utilised to synthesise ATP.


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