Drug receptors: practice question

A Pharmacology 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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Pharmacology · Drug receptors

Sample item

A medicine binds to a receptor and directly produces the receptor's expected signaling response. How is that medicine classified?

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

The answer and the reasoning

C. Agonist

An agonist binds a receptor and initiates a biological response through receptor activation; its efficacy depends on both receptor interaction and downstream signaling.

Option by option

  • A. Inactive placebo

    A placebo has no intended receptor-mediated activity.

  • B. Irreversible antagonist

    An irreversible antagonist blocks rather than activates the receptor.

  • C. Agonist (correct)

    Correct: an agonist activates receptor signaling.

  • D. Metabolic enzyme blocker

    Metabolic inhibition is a different pharmacologic mechanism.

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 Pharmacology questions

Questions about this Pharmacology question

What is the answer to this Pharmacology question?

The best answer is C, Agonist. An agonist binds a receptor and initiates a biological response through receptor activation; its efficacy depends on both receptor interaction and downstream signaling.

Why is "Inactive placebo" not the answer?

A placebo has no intended receptor-mediated activity.

Why is "Irreversible antagonist" not the answer?

An irreversible antagonist blocks rather than activates the receptor.

Why is "Metabolic enzyme blocker" not the answer?

Metabolic inhibition is a different pharmacologic mechanism.

What concept does this question test?

It tests Drug receptors in Pharmacology. The correct option holds because: Correct: an agonist activates receptor signaling.

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 Drug receptors?

Learn drugs as classes, then the exception in each class that an examiner would pick. Then use the flashcards and the other Pharmacology 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.