Question

Which antibiotic inhibits transcription elongation?

• A. Rifampicin
• B. Streptolydigin
• C. Penicillin
• D. Tetracyclin

Answer 1

Answer:

B. Streptolydigin

Streptolydigin prevents elongation while Rifampicin prevents initiation. Penicillin and Tetracyclin act on the ribosome and not on RNA polymerase although even they ultimately inhibit protein synthesis.