Biology Immunity PMDC Conceptual Practice
PMDC Verified Question 37 of 99
Immature precursor T-cells migrate from the bone marrow to become immunologically competent under the influence of the:
A
Liver
B
Thymus gland
C
Spleen
D
Bursa of Fabricius
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option B: Thymus gland
Concept: T-cell maturation microenvironment.

Solution: The thymus gland provides the essential hormonal (thymosin) and cellular microenvironment for T-cell receptor gene rearrangement, positive selection, and negative selection.

Why other options are incorrect:
  • Option A: The liver is a fetal hematopoietic site and metabolic organ.

  • Option C: The spleen is a secondary lymphoid organ for filtering blood.

  • Option D: The Bursa of Fabricius is an avian organ involved in B-cell development.

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.

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