Microbiology chapter 20 (antimicrobial
drugs) questions well answered
Which of the following antibiotics inhibits protein synthesis?
a. Rifampin
b. Vancomycin
c. Streptomycin
d. Isoniazid
e. Cephalosporin - correct answer ✔✔ c.
Bacterial infections are easier to treat using chemotherapy than are other types of infections
caused by other types of microorganisms. Why?
a. Bacteria are more sensitive to chemicals.
b. Bacteria are prokaryotic.
c. Bacteria grow more slowly.
d. Bacteria are smaller than the other types of pathogens. - correct answer ✔✔ b.
,Chloroquine-resistant malaria may be treated with ______________________.
a. Metronidazole
b. mefloquine
c. Tinidazole
d. Quinacrine - correct answer ✔✔ b.
Which of the following statements about antibiotics is true?
a. Penicillin was first discovered by two researchers named Florey and Chain.
b. Most of our antibiotics are produced by Streptomyces, a genus of filamentous soil bacteria.
c. Antibiotics are not typically produced by microorganisms growing in their natural
environments.
d. The finding of antibiotic-producing microorganisms is a rare event. - correct answer ✔✔ b.
Which of the following is NOT a reason for the selective toxicity of sulfa drugs?
a. Bacteria must synthesize folic acid.
, b. Sulfa drugs cause production of antimetabolites.
c. Sulfa drugs inhibit a bacterial enzyme.
d. Humans get folic acid from their diet; they do not synthesize it. - correct answer ✔✔ b.
______________________ are substances that inhibit other microorganisms and are produced
by bacteria and fungi.
a. sulfa drugs
b. protease inhibitors
c. antibiotics
d. polyenes - correct answer ✔✔ c.
Which of the following mechanisms is antifungal?
a. Inhibit 70S ribosomes
b. Interfere with anaerobic metabolism
c. Cause muscle spasms
d. Inhibit ergosterol synthesis
drugs) questions well answered
Which of the following antibiotics inhibits protein synthesis?
a. Rifampin
b. Vancomycin
c. Streptomycin
d. Isoniazid
e. Cephalosporin - correct answer ✔✔ c.
Bacterial infections are easier to treat using chemotherapy than are other types of infections
caused by other types of microorganisms. Why?
a. Bacteria are more sensitive to chemicals.
b. Bacteria are prokaryotic.
c. Bacteria grow more slowly.
d. Bacteria are smaller than the other types of pathogens. - correct answer ✔✔ b.
,Chloroquine-resistant malaria may be treated with ______________________.
a. Metronidazole
b. mefloquine
c. Tinidazole
d. Quinacrine - correct answer ✔✔ b.
Which of the following statements about antibiotics is true?
a. Penicillin was first discovered by two researchers named Florey and Chain.
b. Most of our antibiotics are produced by Streptomyces, a genus of filamentous soil bacteria.
c. Antibiotics are not typically produced by microorganisms growing in their natural
environments.
d. The finding of antibiotic-producing microorganisms is a rare event. - correct answer ✔✔ b.
Which of the following is NOT a reason for the selective toxicity of sulfa drugs?
a. Bacteria must synthesize folic acid.
, b. Sulfa drugs cause production of antimetabolites.
c. Sulfa drugs inhibit a bacterial enzyme.
d. Humans get folic acid from their diet; they do not synthesize it. - correct answer ✔✔ b.
______________________ are substances that inhibit other microorganisms and are produced
by bacteria and fungi.
a. sulfa drugs
b. protease inhibitors
c. antibiotics
d. polyenes - correct answer ✔✔ c.
Which of the following mechanisms is antifungal?
a. Inhibit 70S ribosomes
b. Interfere with anaerobic metabolism
c. Cause muscle spasms
d. Inhibit ergosterol synthesis
