Biology Immunity AJK 2019
PMDC Verified Question 87 of 99
Is a foreign substance, which stimulates the formation of antibodies?
A
Antibiotic
B
Antigen
C
Archaea
D
Transposon
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option B: Antigen
Concept:

The immune system utilizes molecular markers to distinguish "self" from "non-self".

Formula:

None

Solution:

  • Any substance (usually a protein or polysaccharide) that the immune system recognizes as foreign is called an antigen.


  • The presence of an antigen binds to specific receptors on B-cells and T-cells, stimulating an immune cascade that results in the formation of targeted antibodies.


Why other options are incorrect:

  • Antibiotic: A drug used to kill bacteria.


  • Transposon: A jumping gene sequence in DNA.

Quality & Fidelity Assurance: Every question on BeambePrep is rigorously curated against the official PMDC syllabus with zero filler, zero out-of-syllabus content, and zero typos. When an authentic past paper originally contained a historical mistake or ambiguity from the examining board (such as UHS or NUMS), BeambePrep faithfully reflects the original paper while detailing the nuance and scientific consensus in the autopsy above.

Previous Question All Immunity MCQs Next Question

Want to solve full-length papers under timed exam conditions?

Practice with zero-scroll lockdown sprints, dynamic latency zone timers, live peer selection telemetry, and the automated Amber mistake recovery loop.

Enter Arena Sprint iOS App Android App