CELL RESPIRATION
GLYCOLYSIS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Hexokinase (HK)
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Triose phosphate isomerase (TIM)
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Phosphoglycerate kinase (PGK)
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Phosphofructokinase (PFK)
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Detailed explanation-1: -Hexokinase is the initial enzyme of glycolysis, catalyzing the phosphorylation of glucose by ATP to glucose-6-P.
Detailed explanation-2: -So the correct answer is ‘Hexokinase’.
Detailed explanation-3: -Glucose-6-phosphate (G6P) is changed into fructose-6-phosphate (F6P) by phosphoglucoisomerase (phosphoglucose isomerase) in the second step.
Detailed explanation-4: -Hexokinase is the first enzyme in the glycolytic pathway and utilizes ATP to convert glucose to glucose-6-phosphate (G6P).
Detailed explanation-5: -Hexokinase (HK), a glycolytic, regulatory enzyme, phosphorylates glucose to glucose-6-phosphate. During this investment step, a phosphate is cleaved from adenosine triphosphate (ATP), providing a phosphate for glucose-6-phosphate via conversion of ATP to adenosine diphosphate (ADP).