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MHT CET Medical202623 April 2026Morning ShiftBiologyRespiration in PlantsActual

Which enzyme is responsible for phosphorylation of glucose with ATP?

Options

  1. AHexokinase
  2. BPhosphofructokinase
  3. CAldolase
  4. DPhosphohexose isomerase

Correct answer

A. Hexokinase

Step-by-step solution

The first step of glycolysis involves the phosphorylation of glucose to form glucose-6-phosphate. This reaction is catalyzed by the enzyme hexokinase, which uses ATP as the phosphate donor. Phosphofructokinase catalyzes the phosphorylation of fructose-6-phosphate to fructose-1,6-bisphosphate. Aldolase catalyzes the cleavage of fructose-1,6-bisphosphate into two three-carbon sugars. Phosphohexose isomerase catalyzes the isomerization of glucose-6-phosphate to fructose-6-phosphate. Answer: Hexokinase

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