Biology Immunity PMDC Conceptual Practice
PMDC Verified Question 3 of 99
T-Lymphocytes undergo functional maturation in the thymus gland, but they are originally produced in the:
A
Thymus glands
B
Pancreas
C
Bone marrow
D
Heart
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option C: Bone marrow
Concept: Hematopoiesis and lymphocyte maturation.

Solution: All blood cells, including precursor lymphocytes (lymphoblasts), originate in the bone marrow from hematopoietic stem cells. Immature T-cell progenitors then migrate via the bloodstream to the thymus gland, where they mature and become immunologically competent.

Why other options are incorrect:
  • Option A: The thymus gland is the site of maturation and selection, not primary hematopoiesis.

  • Option B & Option D: The pancreas and heart are not hematopoietic or lymphoid organs.

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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