Biology Immunity MDCAT 2019
PMDC Verified Question 84 of 99
Now a day, every new born gets regular shots of vaccine for polio. It contains ____ for polio to make a child immune against this disease.
A
Antisera
B
Antibiotics
C
Antibodies
D
Antigens
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option D: Antigens
Concept:

The fundamental mechanism of a vaccine is to expose the immune system to a safe version of a pathogen.

Formula:

None

Solution:

  • A vaccine contains attenuated (weakened) or dead pathogens, or pieces of the pathogen's surface proteins.


  • These immune-provoking components are known as antigens.


  • When injected, the body recognizes these antigens as foreign and mounts an active immune response to create memory cells.


Why other options are incorrect:

  • Antibodies/Antisera: Used for immediate, temporary passive immunity (like antivenom), not long-term vaccination.


  • Antibiotics: Chemicals that kill bacteria, completely useless against a virus like polio.

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