question_answer 14)

  Phosphorylation of glucose during glycolysis is catalysed by (a) phosphoglucomutase                                                             (b) phosphoglucoisomerase (c) hexokinase                                                                  (d) phosphorylase

Answer:

                 (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  group from inorganic phosphate to an acceptor.