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:
- ABoth A and R are true and R is the correct explanation of A
- BBoth A and R are true but R is NOT the correct explanation of A
- CA is true but R is not false
- DA is not false but R is true
Solution & Step-by-step Explanation
Assertion A is correct: Glycolysis has a preparatory phase where energy is "invested" by using two molecules of ATP.Reason R is correct: The two steps are the phosphorylation of glucose by hexokinase and the phosphorylation of fructose-6-phosphate by phosphofructokinase.Since R identifies the specific steps mentioned in A, R is the correct explanation.