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CET Karnataka Medical CET - Karnataka Medical Solved Paper-2002

  • question_answer
    In the skeletal form of ornithine cycle given, some intermediate products indicated by albhabets. Choose the answer in which these alphabets are properly matched with the names of corresponding products:

    A)  A = arginine, B = succinic acid, C = fumaric acid

    B)  A = citrulline, B = arginine, C = succinic acid

    C)  A = citrulline, B = fumaric acid, C = arginine

    D)  A = citrulline, B = arginine, C = fumaric acid

    Correct Answer: D

    Solution :

    In ornithine cycle a molecule of ammonia combines with \[C{{O}_{2}}\]in mitochondria   to   form   carbamyl phosphate which reacts with ornithine producing citrulline [A]. Citrulline by accepting   another  \[NH_{4}^{+}\] produce arginosuccinate    which    releases fumarate [C] giving rise to arginine [B].


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