NEET Sample Paper NEET Sample Test Paper-14

  • question_answer The enzymes hexokinase which catalyses glucose to glucose 6-phosphate in glycolysis is inhibited by glucose 6-phosphate. This is an example of

    A)  Competitive inhibition

    B)  Non-competitive inhibition

    C)  Feedback allosteric inhibition

    D)  Positive feedback

    Correct Answer: C

    Solution :

    Competitive inhibition is the reversible inhibition of enzyme activity due to the presence of substrate analogs. Non-competitive inhibition is the reduction of enzyme activity by a factor that has no real structural similarity with the substrate. Allosteric inhibition is a reversible non-competitive inhibition occurring in case of allosteric enzymes. Herein, the inhibitors are the products or intermediates of reactions catalysed by the enzymes. Hence, it is also known as end product inhibition or feedback inhibition.

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