Nucleotide 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 · Nucleotide metabolism

Sample item

What base pairs with adenine in DNA?

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

The answer and the reasoning

D. Thymine

The defining Nucleotide metabolism relationship supports Thymine; it is the option that most directly explains the biochemical pathway or pathological process in the stem.

Option by option

  • A. Cytosine

    Cytosine is relevant in a different context but is not supported here.

  • B. Guanine

    Guanine does not account for the central finding in this item.

  • C. Uracil

    Uracil does not match the stated nucleotide metabolism mechanism.

  • D. Thymine (correct)

    Correct. Thymine is the appropriate conclusion from the key feature.

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, Thymine. The defining Nucleotide metabolism relationship supports Thymine; it is the option that most directly explains the biochemical pathway or pathological process in the stem.

Why is "Cytosine" not the answer?

Cytosine is relevant in a different context but is not supported here.

Why is "Guanine" not the answer?

Guanine does not account for the central finding in this item.

Why is "Uracil" not the answer?

Uracil does not match the stated nucleotide metabolism mechanism.

What concept does this question test?

It tests Nucleotide metabolism in Biochemistry. The correct option holds because: Correct. Thymine 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 Nucleotide 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.