Biology Cell PMC 2018
PMDC Verified Question 121 of 143
The membrane separating the vacuole from cytoplasm is called:
A
Vacuolar membrane
B
Tonoplast
C
Cisternae
D
Cristae
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option B: Tonoplast
Concept: The plant central vacuole is highly selective in transporting ions and water.

Solution: The specialized single membrane that bounds the central vacuole of a plant cell is specifically named the tonoplast. It is vital for regulating the movement of ions around the cell and maintaining turgor.

Distractor Autopsy:
  • Cristae: Folds of the inner mitochondrial membrane.
  • Cisternae: Flattened sacs of the ER or Golgi.
  • Vacuolar membrane: While technically descriptive, "tonoplast" is the strict biological term required.

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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