Biology Cell ETEA 2023
PMDC Verified Question 51 of 143
Mitochondria is usually absent in:
A
Mature RBCs
B
Muscle cells
C
Cardiac cells
D
WBCs
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option A: Mature RBCs
Concept: Mammalian red blood cells undergo extreme specialization to maximize oxygen transport.

Solution: During maturation, mammalian red blood cells (mature RBCs) eject their nucleus and degrade all internal organelles, including mitochondria. This frees up maximum space for hemoglobin and prevents the RBC from consuming the oxygen it is meant to deliver (they rely solely on anaerobic glycolysis).

Distractor Autopsy: Muscle and cardiac cells have extremely high energy demands and are packed with abundant mitochondria.

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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