Bacteriology: 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 · Bacteriology

Sample item

Which organism causes diphtheria?

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

The answer and the reasoning

A. Corynebacterium diphtheriae

This item reviews Bacteriology; Corynebacterium diphtheriae is the best answer because it directly matches the drug or organism pattern described.

Option by option

  • A. Corynebacterium diphtheriae (correct)

    Correct. Corynebacterium diphtheriae is supported by the defining feature.

  • B. Listeria

    Listeria is not supported by the key finding.

  • C. Clostridium tetani

    Clostridium tetani does not fit the stated mechanism or pattern.

  • D. Bordetella pertussis

    Bordetella pertussis is plausible 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 Microbiology questions

Questions about this Microbiology question

What is the answer to this Microbiology question?

The best answer is A, Corynebacterium diphtheriae. This item reviews Bacteriology; Corynebacterium diphtheriae is the best answer because it directly matches the drug or organism pattern described.

Why is "Listeria" not the answer?

Listeria is not supported by the key finding.

Why is "Clostridium tetani" not the answer?

Clostridium tetani does not fit the stated mechanism or pattern.

Why is "Bordetella pertussis" not the answer?

Bordetella pertussis is plausible but is not the best answer here.

What concept does this question test?

It tests Bacteriology in Microbiology. The correct option holds because: Correct. Corynebacterium diphtheriae is supported by 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 Bacteriology?

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.