This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Anti Microbial, Subject name: Pharmacology
MOA of vancomycin is: 
Select and explain. 
A. Cell wall synthesis inhibition, B. Cell membrane inhibition, C. Peptide synthesis inhibition, D. 30s ribosome inhibition
A: Cell wall synthesis inhibition
Answer: A: Cell wall synthesis inhibition 
Explanation: ANS. A# Mechanism of action of cell wall synthesis inhibitors* Beta lactam antibiotics: Transpeptidase blocker* Vancomycin: Transglycosylation blocker* Dephosphorylation blocker: Bacitracin* Enol pyruvate transferase blocker: Fosfomycin* Alanine ligase blocker: Cycloserine# Mechanism of action of protein synthesis inhibitors* Aminoglycoside: Blocks initiation by binding to 30s* Linezolid: Blocks initiation by binding to 50s* Tetracycline: Blocks attachment of new amino acid to acceptor site* Chloramphenicol: Peptidyltransferase blocker* Macrolide, lincosamide, streptogramin: Blocks translocation