Respiration In Plants Question 3
Question: 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.
Show Answer
Answer: (1) Both A and R are true and R is the correct explanation of A.
Explaination-
ATP is indeed used at two steps in glycolysis. These steps are the conversion of glucose to glucose-6-phosphate, and the conversion of fructose-6-phosphate to fructose-1,6-bisphosphate. In both of these steps, a phosphate group is added to the substrate, and ATP is used to provide the phosphate group.
The first ATP is used in the conversion of glucose to glucose-6-phosphate, and the second ATP is used in the conversion of fructose-6-phosphate to fructose-1,6-bisphosphate. Therefore, Reason R correctly explains why ATP is used at two steps in glycolysis.
