Antimicrobial Chemotherapeutic Agents problems
- 1. Most antibiotics are isolated from
Options- A. viruses
- B. aquatic microorganisms
- C. soil microorganisms
- D. plants Discuss
Correct Answer: soil microorganisms
- 2. Nystatin is a drug used for treatment of diseases caused by
Options- A. gram negative bacterium
- B. gram positive bacterium
- C. yeast
- D. protozoan Discuss
Correct Answer: yeast
- 3. Polyene antibiotics are
Options- A. large ring structures
- B. ?-lactam - thiazolidine ring
- C. small ring structures
- D. any of these Discuss
Correct Answer: large ring structures
- 4. Quinones and related antibiotics are
Options- A. tetracyclines
- B. actinorhodin
- C. mitomycin
- D. all of these Discuss
Correct Answer: all of these
- 5. Which antibiotic has a beta-lactam ring?
Options- A. Cephalosporin
- B. Penicillin
- C. Tetracycline
- D. Streptomycin Discuss
Correct Answer: Penicillin
- 6. Which of the following is not an aminoglycoside antibiotic?
Options- A. Streptomycin
- B. Neomycin
- C. Kanamycin
- D. Cephalosporin Discuss
Correct Answer: Cephalosporin
- 7. Which of the following is not a semi synthetic chemotherapeutic agent?
Options- A. Ampicillin
- B. Carbenicillin
- C. Penicillin
- D. Sulfonamide Discuss
Correct Answer: Penicillin
- 8. Cycloserine inhibits
Options- A. alanine racemase
- B. D-alanyl - D-alanine synthetase
- C. Both (a) and (b)
- D. amidase Discuss
Correct Answer: Both (a) and (b)
- 9. The larger the __________ , the better the chemotherapeutic agent.
Options- A. therapeutic index
- B. therapeutic dose
- C. selective toxicity
- D. spectrum Discuss
Correct Answer: therapeutic index
- 10. By which of the following means antifungal chemotherapeutic agents may affect fungi?
Options- A. Interfere with nuclear division by preventing the aggregation of microtubules needed for mitosis
- B. Interfere with normal nucleic acid synthesis
- C. Interfere with ergosterol biosynthesis and thus alter the structure of the cytoplasmic membrane as well as the function of several membrane-bound enzymes like those involved in nutrient transport and chitin synthesis
- D. all of these Discuss
Correct Answer: all of these
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