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CMC Medical CMC-Medical VELLORE 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 phosphoenol pyruvate (PEP). It combines with \[C{{O}_{2}}\] is the presence of PEP carboxylase to form oxaloacetate or oxaloacetic acid (OAA).


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