PABA is the target ofSulfonamides, IT is ________________.
A. a substrate used in the production of penicillin
B. a type of belta -lactamase
C. molecularly similar to cephalosporins
D. used to synthesize folic acid
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Which one can not inhibit cell wall synthesis?
A. penicillins,
B. cephalosporin,
C. tetracyclines
D. methicillin.
Which one can not inhibit protein synthesis?
A. penicillins,
B. gentamicin,
C. tetracyclines
D. streptomycin.
Which one is not the advantage of Semisynthetic antibioticscomparing to naturally occurring antibiotics?
A. more effective,
B. much cheaper;
C. longer lasting,
D. easier to administer
The key to successful chemotherapy against microbes is:______.
A. selective toxicity;
B. structure of an antibiotic;
C. Molecular size;
D. the spectrum of action
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