Answer:Gram positive bacteria is more susceptible to penicillin because the peptidoglycan, which forms the cell wall, is directly exposed to the drug. On the other hand, gram negative cell walls have a layer of lipopolysaccharide, and a few other layers, and then the peptidoglycan is there. Therefore, for the penicillin to reach the gram negative peptidoglycan it has to travel through the other layers first
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