Assertion (A): ATP is used at two steps in glycolysis. Reason (R): First for glucose → glucose-6-phosphate, and second for fructose-6-phosphate → fructose-1,6-diphosphate. Choose the correct answer:

Options

1. A is true but R is false
2. A is false but R is true
3. Both A and R are true and R is the correct explanation of A
4. Both A and R are true but R is not the correct explanation of A

Correct Answer

Both A and R are true and R is the correct explanation of A

Explanation

ATP is used twice in glycolysis — for phosphorylation of glucose and fructose-6-phosphate. Thus, R correctly explains A.

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