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Which of the following bacteria lacks cell wall?

(a) Mycoplasma pneumoniae

(b) Bacillus subtilis

(c) Staphylococcus aureus

(d) Helicobacter pylori

This question was addressed to me in my homework.

My query is from Extracellular Matrix and Cell Interactions in chapter Extracellular Matrix and Cell Interactions of Cell Biology

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Correct answer is (a) Mycoplasma pneumoniae

The explanation is: Mycoplasma is a genus of bacteria that does not have a distinct cell wall over their cell membrane. Even though these bacteria lack cell wall, they can effectively protect themselves against antibiotics which have a mode of action of inhibiting cell wall synthesis.

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