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Penicillin, which belongs to the beta-lactam family of antibiotics, is known to be an effective antibiotic against bacteria but is ineffective against mycoplasma. The reason is
a) the cell wall composition of mycoplasma is different from that of bacterial cell wall.
b) mycoplasma lacks a cellwall, so it remains unaffected
c) mycoplasma produces chemicals that counteract penicillin and neutralizes it.
d)penicillin is digested by special enzymes secreted by mycoplasma.

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a only

b only

c only

d only

answer is B.

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Detailed Solution

Penicillin kills bacteria by inhibiting the formation of peptide cross linkages of peptidoglycan cell wall of bacteria.

Since mycoplasma has no cell wall, it remains unaffected.

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