Carbohydrate 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 · Carbohydrate metabolism

Sample item

What enzyme phosphorylates glucose in most tissues at the start of glycolysis?

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

The answer and the reasoning

D. Hexokinase

The core Carbohydrate metabolism principle identifies Hexokinase as the best answer because it most directly explains the biochemical pathway or tissue response described in the stem.

Option by option

  • A. Glycogen phosphorylase

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

  • B. Lactate dehydrogenase

    Lactate dehydrogenase does not account for the central finding in this sample.

  • C. Pyruvate kinase

    Pyruvate kinase does not match the stated carbohydrate metabolism mechanism.

  • D. Hexokinase (correct)

    Correct. Hexokinase 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, Hexokinase. The core Carbohydrate metabolism principle identifies Hexokinase as the best answer because it most directly explains the biochemical pathway or tissue response described in the stem.

Why is "Glycogen phosphorylase" not the answer?

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

Why is "Lactate dehydrogenase" not the answer?

Lactate dehydrogenase does not account for the central finding in this sample.

Why is "Pyruvate kinase" not the answer?

Pyruvate kinase does not match the stated carbohydrate metabolism mechanism.

What concept does this question test?

It tests Carbohydrate metabolism in Biochemistry. The correct option holds because: Correct. Hexokinase 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 Carbohydrate 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.