1. Description: Amoxicillin is a semisynthetic aminopenicillin that inhibits the final transpeptidation step of peptidoglycan synthesis in bacterial cell walls by binding to 1 or more of the penicillin-binding proteins (PBPs), thereby inhibiting cell wall biosynthesis and causing eventual bacterial lysis.

2. Description: Ampicillin inhibits bacterial cell wall synthesis by binding to 1 or more of the penicillin-binding proteins (PBPs) which in turn inhibit the final transpeptidation step of peptidoglycan synthesis in bacterial cell walls.Bacteria eventually lyse due to ongoing activity of cell wall autolytic enzymes (autolysins and murein hydrolases) while cell wall assembly is arrested.