Which of the following antibiotic structurally resembles aminoacyl tRNA and also inhibits protein synthesis:: (A) Puromycin., (B) Tetracycline., (C) Chloramphenicol., (D) Sulphonamides.
Answer is A. Puromycin structurally resembles aminoacyl t-RNA and inhibits protein synthesis by causing premature termination. Tetracyclines inhibit the binding of aminoacyl-tRNA to the A site.