Antibiotics problems
- 1. Penicillin is produced by
Options- A. aerobic fermentation
- B. anaerobic fermentation
- C. aerobic fermentation followed by anaerobic fermentation
- D. anaerobic fermentation followed by aerobic fermentation Discuss
Correct Answer: aerobic fermentation
- 2. Penicillin is recovered after fermentation as
Options- A. potassium penicillin
- B. calcium penicillin
- C. sodium penicillin
- D. penicillin only Discuss
Correct Answer: potassium penicillin
- 3. Streptomycin is produced by
Options- A. S. griseus
- B. S. griseoflavus
- C. S. aerofaciens
- D. S. ramosus Discuss
Correct Answer: S. griseus
- 4. Which of the following organism(s) produce(s) tetracycline?
Options- A. Steptomyces aureofaciens
- B. Steptomyces ramosus
- C. Nocardia sulphurea
- D. All of these Discuss
Correct Answer: All of these
- 5. Which of the following changes occur during first phase of growth of Penicillium chrysogenum?
Options- A. Growth of mycelia occurs
- B. Ammonia is liberated in the medium
- C. Lactic acid present in the corn steep liquor is utilized at the maximum rate
- D. All of the above Discuss
Correct Answer: All of the above
- 6. At acidic pH, penicillin remains in
Options- A. aqueous phase
- B. solvent phase
- C. both (a) and (b)
- D. precipitates Discuss
Correct Answer: solvent phase
- 7. Inoculum preparation for the fermentation medium for penicillin takes place on
Options- A. wheat seeds
- B. barley seeds
- C. rice seeds
- D. all of these Discuss
Correct Answer: barley seeds
- 8. High yield of chlorotetracyclin requires
Options- A. no aeration
- B. continuous aeration
- C. aeration which does not affect the yield
- D. controlled aeration Discuss
Correct Answer: continuous aeration
- 9. Which of the following event occurs during third phase of growth of P chrysogenum?
Options- A. Concentration of antibiotic increases in the medium
- B. Autolysis of the medium starts
- C. Slight rise in pH due to liberation of ammonia
- D. All of the above Discuss
Correct Answer: All of the above
- 10. Which of the following event occurs during second phase of growth of P. chrysogenum?
Options- A. Synthesis of penicillin is high
- B. Mycelial mass increases
- C. pH increase
- D. Both (a) and (b) Discuss
Correct Answer: Both (a) and (b)
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