Oxidative phosphorylation: practice question

The best answer is A, Proton gradient. This item reviews Oxidative phosphorylation; Proton gradient is the best answer because it directly matches the biochemical or pathological mechanism described.

Glucose is plausible but not the best answer.

Calcium is unsupported by the key feature.

Sodium gradient only does not fit the stated pattern.

It tests Oxidative phosphorylation in Biochemistry. The correct option holds because: Correct. Proton gradient fits the defining mechanism.

We tag it as an application question: it asks you to use a fact on a patient or a finding. The tag is our own editorial judgement, not an official difficulty rating, so read the reason for every option, not only the answer.

Build one table of enzyme deficiency, disease, inheritance and key finding, then revise it by spaced recall. Then use the flashcards and the other Biochemistry questions on this site to test what stuck.

No. It is an original practice item (editorial status: sample, version 1). NextPrep does not publish recalled or leaked questions, and independent faculty review of this item has not been completed yet, so confirm important facts in a standard textbook.