Virology: practice question

A Microbiology 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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Microbiology · Virology

Sample item

Which hepatitis virus requires hepatitis B surface antigen for replication?

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

The answer and the reasoning

D. Hepatitis D virus

Hepatitis D virus is a defective RNA virus that requires hepatitis B surface antigen to assemble infectious particles and propagate.

Option by option

  • A. Hepatitis A virus

    HAV is independent faecal-oral virus.

  • B. Hepatitis C virus

    HCV is independent RNA virus.

  • C. Hepatitis E virus

    HEV does not require HBV.

  • D. Hepatitis D virus (correct)

    Correct: HDV depends on HBV surface antigen.

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 Microbiology questions

Questions about this Microbiology question

What is the answer to this Microbiology question?

The best answer is D, Hepatitis D virus. Hepatitis D virus is a defective RNA virus that requires hepatitis B surface antigen to assemble infectious particles and propagate.

Why is "Hepatitis A virus" not the answer?

HAV is independent faecal-oral virus.

Why is "Hepatitis C virus" not the answer?

HCV is independent RNA virus.

Why is "Hepatitis E virus" not the answer?

HEV does not require HBV.

What concept does this question test?

It tests Virology in Microbiology. The correct option holds because: Correct: HDV depends on HBV surface antigen.

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 Virology?

Make a one-line identity card for each organism: shape and stain, defining test, toxin, disease and drug. Then use the flashcards and the other Microbiology 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.