Biology Inheritance / Variation & Genetics KMU 2024
PMDC Verified Question 6 of 94
Which of the following blood groups has anti-A and anti- B antibodies in the serum?
A
A
B
AB
C
B
D
O
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option D: O
Concept:

The immune system produces antibodies against red blood cell antigens that are not present in the individual's own body.

Solution:

  • Individuals with Blood Group O have genotype \(ii\).
  • Their red blood cells completely lack both Antigen A and Antigen B.
  • Because both antigens are viewed as foreign by their immune system, their blood plasma naturally produces both anti-A and anti-B antibodies.
  • This makes them universal donors (no antigens to trigger a recipient) but limits them to only receiving Group O blood.


Why other options are incorrect:

  • Group A: Has Antigen A, produces Anti-B.
  • Group B: Has Antigen B, produces Anti-A.
  • Group AB: Has both antigens, produces NO antibodies.

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 Inheritance / Variation & Genetics 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