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neet BIOLOGYMedium

Given below are two statements : One is labelled as Assertion A and the other is labelled as Reason R : Assertion A : ATP is used at two steps in glycolysis. Reason R : First ATP is used in converting glucose into glucose-6-phosphate and second ATP is used in conversion of fructose-6-phosphate into fructose-1, 6-diphosphate. In the light of the above statements, choose the correct answer from the options given below :

1

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

2

Both A and R are true but R is NOT the correct explanation of A.

3

A is true but R is false.

4

A is false but R is true.

Step-by-Step Solution

In glycolysis, ATP is consumed in two steps: 1) Phosphorylation of glucose to glucose-6-phosphate by hexokinase, and 2) Phosphorylation of fructose-6-phosphate to fructose-1,6-bisphosphate by phosphofructokinase. Thus, both Assertion and Reason are true and the reason correctly explains the assertion.

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