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Penicillin kills bacteria but not our cells because

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None of the above

Our cells do not form a cell wall

Our cells are immune to penicillin

Penicillin blocks the formation of cell wall

answer is C.

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Detailed Solution

Penicillin mainly interferes with the bacterial cell wall and prevents the formation of cell wall, thereby killing the bacteria.
As our cells do not form a cell wall that's why penicillin kills bacteria but not our cells.

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