50. Amphotericin B and polymyxin interfere with
A.cell wall synthesis
B.protein synthesis
C.cell membrane function
D.DNA function
51. Which of the following is not β-lactamase-resistant penicillin?
A.Oxacillin
B.Nafcillin
C.Carbenicillin
D.Methicillin
52. The antibiotics which affords a broad spectrum of antimicrobial coverage against aerobic and anaerobic bacteria, rickettsiae, chlamydiae, and mycoplasmas is
A.gentamicin
B.tetracycline
C.metronidazole
D.vancomycin
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