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NEET2015BotanyBiomolecules (B)Actual

The enzyme hexokinase which catalysis glucose to a glucose-6-phosphate in glycolysis is inhibited by glucose-6-phosphate. This is an example of I. competitive inhibition II. non-competitive inhibition III. feedback allosteric inhibition Which of the above statements is/are correct?

Options

  1. AI and II
  2. BI and III
  3. COnly III
  4. DAll of these

Correct answer

C. Only III

Step-by-step solution

Hexokinase catalyses the phosphorylation of hexose in general and is found in all cells that metabolise glucose. It has low K_m (high affinity, strong bonding) with glucose in such a way that it is active at low glucose concentration. It shows allosteric feed beat inhibition by to product glucose-6-phosphate.

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