Lipid metabolism: practice question

A Biochemistry question in the style of the NEET PG paper. Answer it first, then read why the right option is right and why each of the others is wrong.

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Biochemistry · Lipid metabolism

Sample item

What is the main ketone body produced during prolonged fasting?

Original practice item, not a recalled exam question. Nothing here is recorded.

The answer and the reasoning

D. Beta-hydroxybutyrate

The core Lipid metabolism principle identifies Beta-hydroxybutyrate as the best answer because it most directly explains the biochemical pathway or tissue response described in the stem.

Option by option

  • A. Citrate

    Citrate does not account for the central finding in this sample.

  • B. Oxaloacetate

    Oxaloacetate is relevant in another context but is not the best answer here.

  • C. Pyruvate

    Pyruvate does not match the stated lipid metabolism mechanism.

  • D. Beta-hydroxybutyrate (correct)

    Correct. Beta-hydroxybutyrate is supported by the key clue given.

Source note: Original NextPrep sample item — pending expert review. This item is original practice material awaiting independent expert review, so confirm important facts in a standard textbook.

More Biochemistry questions

Questions about this Biochemistry question

What is the answer to this Biochemistry question?

The best answer is D, Beta-hydroxybutyrate. The core Lipid metabolism principle identifies Beta-hydroxybutyrate as the best answer because it most directly explains the biochemical pathway or tissue response described in the stem.

Why is "Citrate" not the answer?

Citrate does not account for the central finding in this sample.

Why is "Oxaloacetate" not the answer?

Oxaloacetate is relevant in another context but is not the best answer here.

Why is "Pyruvate" not the answer?

Pyruvate does not match the stated lipid metabolism mechanism.

What concept does this question test?

It tests Lipid metabolism in Biochemistry. The correct option holds because: Correct. Beta-hydroxybutyrate is supported by the key clue given.

How hard is this question?

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.

How should I study Lipid metabolism?

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.

Is this a real NEET PG question?

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.