Biology Cell MDCAT 2017
PMDC Verified Question 125 of 143
Which of the following structure is present in both plant and animal cells but is absent in prokaryotic cells?
A
Microtubule
B
Centrioles
C
Plastids
D
Sieve tubes
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option A: Microtubule
Concept: Eukaryotic cells possess a complex cytoskeleton, whereas prokaryotic cells have a much simpler, differing structural framework.

Solution: Microtubules are protein filaments (tubulin) forming the cytoskeleton in all eukaryotes (plants and animals). Prokaryotes lack true tubulin-based microtubules.

Distractor Autopsy:
  • Centrioles: Absent in higher plants.
  • Plastids: Absent in animal cells.
  • Sieve tubes: Specialized plant structures (phloem), absent in animals and prokaryotes.

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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