There are many kinds of antibiotics, which kill bacteria in different ways. Take β _ lactam antibiotics as an example. They combine with pbps on bacterial cell membrane, which hinders the synthesis of cell wall mucin and prevents it from cross-linking, resulting in cell wall defect and bacterial cell rupture and death. Aminoglycosides cause membrane damage and inhibit mrna transcription and protein synthesis. Other quinolones, macrolides and glycopeptides have different mechanisms of action.

. There are many kinds of bacteria that only inhibit their synthesis instead of killing them directly.