Biology The Living World Previous Year Questions Single Correct MCQ
Published on: August 14, 2026

Cell wall is absent in :

A
Nostoc
B
Aspergillus
C
Funaria
D
Mycoplasma

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Text Solution

Verified by Experts
The correct answer is:
D

Mycoplasma is a genus of bacteria that naturally lacks a cell wall around its cell membrane.

Because they lack a rigid cell wall, they are pleomorphic (can take many shapes) and are naturally resistant to many common antibiotics, like penicillin, that specifically target cell wall synthesis.

They are known as the smallest free-living organisms and belong to the class Mollicutes.

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