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

During respiration, substrate level phosphorylation occurs in ____.

A Cytoplasm only
B Mitochondrial matrix only
C Cytoplasm and mitochondrial matrix
D intermembrane space of mitochondria

Verified Solution

Answer & Solution

Correct Answer

(C) Cytoplasm and mitochondrial matrix

Step-by-step Solution

Detailed explanation

Substrate-level phosphorylation is a direct phosphorylation of ADP by transfer of a phosphate group from any suitable substrate. It occurs in cytoplasm of the cells and matrix of mitochondria

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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