What is the mechanism of action used by cephalosporins in the treatment of bacterial infections?

Cephalosporins exert their mechanism of action by inhibiting cell wall synthesis in bacteria. This is achieved by binding to penicillin-binding proteins (PBPs) and disrupting the cross-linking of peptidoglycans in the bacterial cell wall. This weakens the cell wall, leading to bacterial cell lysis and eventual death. In contrast, choice A (Inhibition of protein synthesis) is typically associated with antibiotics like macrolides and aminoglycosides. Choice B (Inhibition of DNA replication) is a mechanism of action for antibiotics like fluoroquinolones. Choice D (Inhibition of folic acid synthesis) is a mechanism seen in antibiotics like sulfonamides. Overall, the correct answer, choice C, is specific to cephalosporins due to their ability to disrupt cell wall synthesis.