This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Antibiotics, Subject name: Pharmacology
[{'content': 'Penicillins inhibit which of the following bacterial processes/compounds \nSelect and explain. \nA. Topoisomerase, B. Protein synthesis, C. Cell-wall synthesis, D. Dihydropteroate synthase', 'role': 'user'}, {'content': 'Answer: C \nExplanation: PENICILLINS Mechanism of action All b-lactam antibiotics interfere with the synthesis of bacterial cell wall. The b-lactam antibiotics inhibit the trans- peptidases so that cross linking (which maintains the close knit structure of the cell wall) does not take place. These enzymes and related proteins constitute the penicillin binding proteins (PBPs) which have been located in the bacterial cell membrane. Ref:- kd tripathi; pg num:-716,717', 'role': 'assistant'}]