DNA: 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 · DNA

Sample item

What base pair is present in DNA?

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

The answer and the reasoning

A. Adenine-thymine

This item reviews DNA; Adenine-thymine is the best answer because it directly matches the biochemical or pathological mechanism described.

Option by option

  • A. Adenine-thymine (correct)

    Correct. Adenine-thymine fits the defining feature.

  • B. Uracil-guanine

    Uracil-guanine is plausible but not the best answer.

  • C. Adenine-uracil

    Adenine-uracil does not fit the stated mechanism.

  • D. Thymine-uracil

    Thymine-uracil is unsupported by the key finding.

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, Adenine-thymine. This item reviews DNA; Adenine-thymine is the best answer because it directly matches the biochemical or pathological mechanism described.

Why is "Uracil-guanine" not the answer?

Uracil-guanine is plausible but not the best answer.

Why is "Adenine-uracil" not the answer?

Adenine-uracil does not fit the stated mechanism.

Why is "Thymine-uracil" not the answer?

Thymine-uracil is unsupported by the key finding.

What concept does this question test?

It tests DNA in Biochemistry. The correct option holds because: Correct. Adenine-thymine fits the defining 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 DNA?

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.