Penicillins are believed to exert their antibacterial effect by which one of the following mechanisms.. Inhibition of bacterial cell wall synthesis

Penicillins are believed to exert their antibacterial effect by which one of the following mechanisms?
A) Detergent effect on the bacterial cell membrane
B)Inhibition of protein synthesis
C) Destruction of the bacterial cell nucleus
D) Inhibition of bacterial cell wall synthesis***
E) Steric hindrance of membrane acids.