4. Which of the following is not a common characteristic used in the selection of an antimicrobial drug?
a. Selective toxicity
b. Ease of delivery to the site of infection
c. Ability to administer intravenously
d. Potential for allergic reaction

5. The term bacteriostatic means that bacteria
a. are killed by the antimicrobial drug.
b. show continuous growth.
c. no longer can multiply.
d. no longer cause disease.

6. Drugs that are effective against gram-positive and gram-negative bacteria, but not all of them, are ____________-activity drugs.
a. small-spectrum
b. narrow-spectrum
c. medium-spectrum

d. broad-spectrum