Ncert Exercises & Solutions

Phosphorylation of glucose during glycolysis is catalysed by

1. phosphoglucomutase

2. phosphoglucoisomerase

3. hexokinase

4. phosphorylase

(c) Hexokinase catalyses the conversion of glucose into glucose 6-phosphate by the use of ATP molecule in phosphorylation reaction.

The other options are incorrect because

Phosphoglucomutase is an enzyme that transfers a phosphate group in D-glucose monomer from 1-to 6 position of carbon in forward direction (changes glucose 1-phosphate to glucose-6 phosphate).

Phosphoglucoisomerase catalyses conversion of glucose 6 phosphate to fructose 6 phosphate.

Phosphorylase is an enzyme which catalyses the addition of phosphate PO₄^- group from inorganic phosphate to an acceptor.

Page 229, XI NCERT

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