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Question

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


Solution

Option (c) hexokinase

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

The other options are incorrect because 
Phosphoglucomulase 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). 
Phosphogiucolsornerase catalyses the conversion of glucose 6 phosphate to fructose 6 phosphate. 
Phosphorylase is an enzyme which catalyses the addition of phosphate PO_4^- group from inorganic phosphate to an acceptor. 


Biology
NCERT Exemplar
Standard XI

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