Pharmacology Mechanism of action of cephalosporin is: A Inhibition of beta-lactamase. B Inhibition of the synthesis of precursors of peptidoglycan. C Interference with the synthesis of ergosterol. D Inhibition of transpeptidation reaction. 💡 Explanation Mechanism of action of cephalosporin is: ✓ Correct Answer: D. Inhibition of transpeptidation reaction.