Which of the following drugs acts by blocking RNA transcription?: (A) Rifampicin, (B) Streptomycin, (C) Isoniazid, (D) Chloramphenicol
Answer is A. DRUG MECHANISM Rifampicin Inhibit transcription of RNA Isoniazid Act on mycobacterial membrane Streptomycin Inhibit protein synthesis Chloramphenicol Inhibit protein synthesis