Which two antibiotics affect the DNA and RNA of bacteria?

Which two antibiotics affect the DNA and RNA of bacteria?

A. tetracycline and amphotericin B
B. trimethoprim and sulfonamides
C. rifampin and quinolones
D. tetracycline and bacitracin

Answer: C

Which therapeutic index value would be the drug of choice?

Which therapeutic index value would be the drug of choice?

A. 20
B. 10
C. 1
D. 0.1
E. Any value would be equally effective.

Answer: A

If pathogen A is more resistant to an erythromycin disc on a Kirby-Bauer plate compared to pathogen B, then pathogen A will have a(n) _____ zone of inhibition compared to pathogen B.

If pathogen A is more resistant to an erythromycin disc on a Kirby-Bauer plate compared to pathogen B, then pathogen A will have a(n) _____ zone of inhibition compared to pathogen B.

A. smaller
B. equal
C. larger
D. All of the choices are correct.
E. None of the choices is correct.

Answer: A

A ratio of the dose of a drug that is toxic to humans versus the minimum effective dose for that pathogen is assessed to predict the potential for toxic drug reactions. This is called the

A ratio of the dose of a drug that is toxic to humans versus the minimum effective dose for that pathogen is assessed to predict the potential for toxic drug reactions. This is called the

A. Kirby-Bauer.
B. antibiogram.
C. E-test.
D. MIC.
E. therapeutic index (TI).

Answer: E