Q.

Which among the following does not have a cell wall?

A. Euglena
B. Paramecium
C. Gonyaulax
D. Mycoplasma
Answer» D. Mycoplasma
Explanation: Mycoplasma is a genus of bacteria that lacks a cell wall around their cell membrane Without a cell wall, they are unaffected by many common antibiotics such as penicillin or other beta-lactam antibiotics that target cell wall synthesis.
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