Question

Phosphorylation of glucose during glycolysis is catalysed by

• A. Phosphoglucomutase
• B. Phosphoglucoisomerase
• C. Hexokinase
• D. Phosphorylase

Answer 1

Answer: (C)

Hexokinase

In the process of glycolysis, the first step involves the phosphorylation of glucose/fructose which results in the formation of Glucose-6-phosphate. The reaction is catalyzed by the help of enzyme hexokinase in the presence of Mg${}^{+}$${}^2$ ion. The reaction is:

Glucose(6C) + ATP $\to$ Glucose-6-phosphate + ADP .

So, the correct answer to the question is 'Hexokinase'.