Multiple choice Which of the following antibiotics blocks the synthesis of bacterial cell wall? Streptomycin Tetracycline Penicillin Erythromycin Reveal answer Fill a bubble to check yourself C Correct answer Explanation Penicillin acts by inhibiting the cross-linking of peptidoglycan chains in the bacterial cell wall, which leads to cell lysis. Other options like Streptomycin and Tetracycline target protein synthesis.