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 is present in RNA instead of thymine?

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

The answer and the reasoning

A. Uracil

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

Option by option

  • A. Uracil (correct)

    Correct. Uracil is supported by the key clue given.

  • B. Adenine

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

  • C. Cytosine

    Cytosine does not match the stated nucleotide metabolism mechanism.

  • D. Guanine

    Guanine is relevant in another context but is not the best answer 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 A, Uracil. The core Nucleotide metabolism principle identifies Uracil as the best answer because it most directly explains the biochemical pathway or tissue response described in the stem.

Why is "Adenine" not the answer?

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

Why is "Cytosine" not the answer?

Cytosine does not match the stated nucleotide metabolism mechanism.

Why is "Guanine" not the answer?

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

What concept does this question test?

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