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

During glycolysis the first five major steps constitute

A Carboxylation
B Preparatory phase and cleavage
C Oxidation
D Payoff phase

Verified Solution

Answer & Solution

Correct Answer

(B) Preparatory phase and cleavage

Step-by-step Solution

Detailed explanation

First five steps constitute the preparatory phase through which glucose is phosphorylated twice at the cost of two ATP molecules and a molecule of fructose 1, 6-bisphosphate is formed. This molecule is then split to form a molecule of glyceraldehyde-3-phosphate and a molecule of dihydroxyacetone phosphate.

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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