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penicillin comes from a fungus. the fungus grows and lives by breaking down organic molecules of decomposing animal and plant life. penicillin itself doesnt "get energy" but rather is derived from the fungus.

if you are asking how penicillin destroys some microorganisms - the answer is that it interferes with the ability of a newly formed bacterium to develop a cell wall. a bacterium cannot survive without a cell wall.

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12y ago

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