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NEET AIPMT SOLVED PAPER 2000

  • question_answer
                    In living beings, ammonia is converted into urea through:                                                            

    A)                 Ornithine cycle 

    B)                 citrulline cycle

    C)                 fumarine cycle

    D)                 arginine cycle

    Correct Answer: A

    Solution :

                    Ornithine combines with one molecule of and \[C{{O}_{2}}\] to produce citrulline. Citrulline combines with another molecule of \[N{{H}_{3}}\] to form arginine. Arginine is broken down into urea and Ornithine which repeats the cycle. This is called ornithine cycle or urea cycle or Kreb-Henseleit cycle.


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