Biology Acellular Life UHS 2023
PMDC Verified Question 33 of 70
The molecules used to control virus during infection of animal cells are:
A
Antigen
B
Interferon
C
Serum
D
Histone
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option B: Interferon
Concept:

Host cells possess innate biochemical defense mechanisms to limit viral spread to neighboring cells.

Solution:

  • When an animal cell is infected by a virus, it secretes antiviral proteins called interferons.
  • These molecules bind to receptors on adjacent, uninfected cells, signaling them to produce enzymes that degrade viral RNA and inhibit viral protein synthesis, effectively "interfering" with viral replication.


Why other options are incorrect:

  • Antigen: The foreign molecule that triggers an immune response, not the defensive molecule.
  • Histone: A structural protein for packaging DNA in eukaryotes.
  • Serum: Blood plasma without clotting factors; while it contains antibodies, interferons are the specific cellular molecules secreted locally for immediate viral control.

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 Acellular Life 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