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NEET Biology Biomolecules / जैव-अणु Question Bank Self Evaluation Test - Biomolecules

  • question_answer
    Ammonia is very toxic to brain cells. This is immediately trapped in brain by one of the following mechanisms.

    A) Glutamine synthetase reaction

    B) Glutaminase reaction

    C) Urea synthesis cycle

    D) Glutamate dehydrogenase reaction

    Correct Answer: A

    Solution :

    [a] Glutamine synthetase catalyses the reaction, glutamic acid + ammonia \[\to \] glutamine; this traps the ammonia in brain. Glutaminase catalyses the reverse reaction, glutamine \[\to \] glutamic acid + ammonia. Urea cycle is takingplace in liver. Glutamate dehydrogenase removes ammonia from glutamic acid, and this is taking place in liver.


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