Fatty acids: 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 · Fatty acids

Sample item

Which enzyme is rate limiting for fatty-acid synthesis?

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

The answer and the reasoning

B. Acetyl-CoA carboxylase

This item reviews Fatty acids; Acetyl-CoA carboxylase is the best answer because it directly fits the mechanism or morphology described.

Option by option

  • A. HMG-CoA reductase

    HMG-CoA reductase does not match the key mechanism or pattern.

  • B. Acetyl-CoA carboxylase (correct)

    Correct. Acetyl-CoA carboxylase is supported by the defining finding.

  • C. Carnitine acyltransferase

    Carnitine acyltransferase is not supported by the stated finding.

  • D. Lipoprotein lipase

    Lipoprotein lipase is plausible but is not the best fit here.

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 B, Acetyl-CoA carboxylase. This item reviews Fatty acids; Acetyl-CoA carboxylase is the best answer because it directly fits the mechanism or morphology described.

Why is "HMG-CoA reductase" not the answer?

HMG-CoA reductase does not match the key mechanism or pattern.

Why is "Carnitine acyltransferase" not the answer?

Carnitine acyltransferase is not supported by the stated finding.

Why is "Lipoprotein lipase" not the answer?

Lipoprotein lipase is plausible but is not the best fit here.

What concept does this question test?

It tests Fatty acids in Biochemistry. The correct option holds because: Correct. Acetyl-CoA carboxylase is supported by the defining finding.

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 Fatty acids?

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.