Penicillin was considered a "miracle drug" for all of the following reasons except

1. Penicillin was considered a "miracle drug" for all of the following reasons except

 a. It is produced by a mold

 b. It does not affect eukaryotic cells

 c. It is active against many gram-positive bacteria

2. All of the following statements about drug resistance are true except…

 a. It may be carried on a bacterial plasmid.

 b. It may be transferred from one bacterium to another during conjugation.

 c. It may be due to enzymes that break-down some antibiotics

 d. It occurs only in gram-negative bacteria


3. The first true antibiotic discovered was…

 a. Salvarsan

 b. streptomycin

 c. sulfa drugs

 d. penicillin