This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pharmacology
[{'content': 'Tetracycline inhibits protein synthesis by? \nSelect and explain. \nA. Inhibiting initiation and causing misreading of mRNA, B. Binding to 30 S subunit and inhibits binding of aminoacyltRNA, C. Inhibiting peptidyltransferase activity, D. Inhibiting translocation', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., Binding to 30 S subunit and inhibits binding of aminoacyl tRNA Tetracycline interact with small ribosomal subunits, blocking access of aminoacyl- tRNA to the mRNA-ribosome complex.", 'role': 'assistant'}]