Enzymes: 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 · Enzymes

Sample item

What does a lower Km generally indicate for an enzyme substrate?

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

The answer and the reasoning

B. Higher affinity

The defining Enzymes relationship supports Higher affinity; it is the option that most directly explains the biochemical pathway or pathological process in the stem.

Option by option

  • A. Irreversible inhibition

    Irreversible inhibition does not account for the central finding in this item.

  • B. Higher affinity (correct)

    Correct. Higher affinity is the appropriate conclusion from the key feature.

  • C. Lower maximum velocity

    Lower maximum velocity does not match the stated enzymes mechanism.

  • D. No catalytic activity

    No catalytic activity is relevant in a different context but is not supported 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, Higher affinity. The defining Enzymes relationship supports Higher affinity; it is the option that most directly explains the biochemical pathway or pathological process in the stem.

Why is "Irreversible inhibition" not the answer?

Irreversible inhibition does not account for the central finding in this item.

Why is "Lower maximum velocity" not the answer?

Lower maximum velocity does not match the stated enzymes mechanism.

Why is "No catalytic activity" not the answer?

No catalytic activity is relevant in a different context but is not supported here.

What concept does this question test?

It tests Enzymes in Biochemistry. The correct option holds because: Correct. Higher affinity is the appropriate conclusion from the key feature.

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 Enzymes?

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.