Punjab Medical Punjab - MET Solved Paper-2009

  • question_answer
    The first \[C{{O}_{2}}\] acceptor in \[{{C}_{4}}\] cycle is

    A) \[RuBP\]                             

    B) \[PEP\]

    C) \[PGA\]                               

    D) \[OAA\]

    Correct Answer: B

    Solution :

    In \[{{C}_{4}}\] plants, fixation of \[C{{O}_{2}}\] occurs in mesophyll cells. The primary acceptor of \[C{{O}_{2}}\] is phosphor enol pyruvate\[(PEP)\]. It combines with \[C{{O}_{2}}\] in the presence of \[PEP\] carboxylase to form oxaloacetate or oxaloacetic acid\[(OAA)\].


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