RAJASTHAN PMT Rajasthan - PMT Solved Paper-2009

  • question_answer
    The first \[C{{O}_{4}}\] 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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