<prompt> RNA transcription is blocked by this ATT:RifampicinStreptomycinChloroamphenicolINH  <response>: Ref: 7th ed. Pg. 768MOA OF IMPORTANT ATT Streptomycin- inhibit protein synthesis Chloroamphenicol- inhibit protein synthesis by inhibiting transpeptidation Rifampicin- inhibit DNA dependent RNA synthesis by inhibiting RNA polymerase INH Pyrazinamide: inhibits mycolic acid, a component of mycobacterial cell wall Ethambutol: Inhibit incorporation of mycolic acid into bacterial cell wall by inhibiting arabinosyl transferase, thus weakening the wall. 