Biology
Grade-10
Easy
Question
Which of the following is the first enzyme of glycolysis?
- Pyruvate dehydrogenase
- Phosphofructokinase
- Hexokinase
- None of the above
Hint:
Glycolysis is the metabolic process in which one molecule of glucose is converted into two molecules of pyruvate, two hydrogen ions, and one after molecule with the release of energy-containing molecules.
The correct answer is: Hexokinase
The first step of glycolysis is the conversion of glucose to glucose-6-phosphate. This reaction is catalyzed by the enzyme hexokinase. Hexokinase is an enzyme that phosphorylates hexose sugars.
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