MHT CET · BIOLOGY · STD 11 - 13. Respiration and Energy Transfer

During glycolysis, out of the 10 reactions, the number of irreversible reactions are

A 6
B 2
C 4
D 10

Verified Solution

Answer & Solution

Correct Answer

(C) 4

Step-by-step Solution

Detailed explanation

In glycolysis there are four irreversible reactions. Some steps in glycolysis are irreversible because they are needed to control the glycolytic pathway and ensure the production of ATP. Hexokinase, phosphofructokinase, phosphoglycerate kinase and pyruvate kinase are the four enzymes which catalyzes the irreversible reactions in glycolysis.

Apply the relevant identity from the chapter and substitute the values established in the previous step, keeping the original constraint in view.

Use the simplified expression to isolate the unknown, then plug the result back into the question setup to confirm the working is internally consistent.

Cross-check against a boundary or limiting case. Both the dimensional balance and the qualitative behaviour at the extreme should agree with the candidate answer.

Combine the steps above to identify the correct option. The remaining choices each fail at least one of the consistency, dimensional, or boundary checks.

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