Question

multiple choice question
which of the following is a bacterial cell wall inhibitor found in over - the - counter antibacterial ointments?
○ ciprofloxacin
○ amoxicillin
○ bacitracin
○ streptomycin
○ tetracycline

Explanation:

To solve this, we analyze each antibiotic:

• Ciprofloxacin: Fluoroquinolone, targets DNA gyrase (not cell wall).
• Amoxicillin: β - lactam, but oral (not typical OTC ointment).
• Bacitracin: Inhibits bacterial cell wall synthesis, commonly in OTC antibacterial ointments.
• Streptomycin: Aminoglycoside, targets ribosomes (not cell wall).
• Tetracycline: Targets ribosomes (not cell wall).

Answer:

C. bacitracin