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- Question
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
- Correct Answer
- All of the above
- 1. High yield of chlorotetracyclin requires
Options- A. no aeration
- B. continuous aeration
- C. aeration which does not affect the yield
- D. controlled aeration Discuss
- 2. 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
- 3. At acidic pH, penicillin remains in
Options- A. aqueous phase
- B. solvent phase
- C. both (a) and (b)
- D. precipitates Discuss
- 4. 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
- 5. Which of the following organism(s) produce(s) tetracycline?
Options- A. Steptomyces aureofaciens
- B. Steptomyces ramosus
- C. Nocardia sulphurea
- D. All of these Discuss
- 6. 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
- 7. Vegetable oil, (corn oil or soybean oil) added in the fermentation medium for penicillin, act as
Options- A. source of nutrients
- B. carbon source
- C. antifoam agent
- D. both (a) and (c) Discuss
- 8. P1 cloning vector is the example of
Options- A. plasmid
- B. cosmid
- C. bacteriophage
- D. phagemid Discuss
- 9. M 13 is an example of
Options- A. filamentous phage
- B. single stranded DNA vector
- C. both (a) and (b)
- D. plasmid Discuss
- 10. Plasmid incompatibility is
Options- A. inability of a plasmid to grow in the host
- B. inability of two different plasmids to coexist in the same host cell in the absence of selection pressure.
- C. both (a) and (b)
- D. none of the above Discuss
Antibiotics problems
Search Results
Correct Answer: continuous aeration
Correct Answer: barley seeds
Correct Answer: solvent phase
Correct Answer: All of the above
Correct Answer: All of these
Correct Answer: Both (a) and (b)
Correct Answer: antifoam agent
Correct Answer: bacteriophage
Correct Answer: both (a) and (b)
Correct Answer: inability of two different plasmids to coexist in the same host cell in the absence of selection pressure.
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