7. Which of the following is not a test to determine the efficacy of an antimicrobial agent against a specific organism?
a. Polymerase chain reaction
b. Kirby-Bauer method
c. Minimal inhibitory concentration method
d. Serum killing power method

8. When two antibiotics are given together to increase the therapeutic effect, the phenomenon is referred to as
a. antagonism.
b. mutualism.
c. synergism.
d. parasitism.

9. Antimicrobial drugs that adversely affect the red bone marrow are referred to as
a. hepatotoxic.
b. hemotoxic.
c. neurotoxic.
d. nephrotoxic.