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Respiration in Plants question

2023 · Q21
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Respiration in Plants question

2023 · Q21

NEETBiologyRespiration in PlantsMCQ+4 / −1

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. A
    Both A and R are true but R is NOT the correct explanation of A.
  2. B
    A is true but R is false.
  3. C
    A is false but R is true.
  4. D
    Both A and R are true and R is the correct explanation of A.
View written solutionFree

Correct answer: D

The process of glycolysis involves the breakdown of glucose into two molecules of pyruvate. This metabolic pathway is divided into two parts: the energy investment phase and the energy payoff phase.



In the energy investment phase, two molecules of ATP are indeed used. The first ATP is used to convert glucose into glucose-6-phosphate, and the second ATP is used to convert fructose-6-phosphate into fructose-1, 6-diphosphate. These steps are necessary to prepare the glucose molecule for the energy payoff phase, where ATP will be generated.



So, both Assertion A and Reason R are true, and Reason R correctly explains Assertion A.



Therefore, the answer is :



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

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