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- Question
pH of the fermentation medium for chlorotetracyclins is
Options- A. 5-6
- B. 6-7
- C. 7-8
- D. 8-9
- Correct Answer
- 5-6
- 1. During which phase of growth of Penicillium chrysogenum maximum antibiotic production takes place
Options- A. during the first phase
- B. during the second phase
- C. during the third phase
- D. same in all the phases Discuss
- 2. Chlorotetracyclin is soluble in
Options- A. organic solvents
- B. water
- C. ether
- D. all of these Discuss
- 3. The yield of the antibiotic depends upon
Options- A. pH of the medium
- B. age of the inoculum
- C. composition of the medium
- D. all of these Discuss
- 4. Media composition for the production of streptomycin is
Options- A. soybean meal, glucose, peptone, malt extract, sodium chloride
- B. soybean meal, glucose, peptone, malt extract, ammonium chloride
- C. soybean meal, glucose, peptone, malt extract, calcium carbonate
- D. soybean meal, glucose, peptone, malt extract, ammonium sulphate Discuss
- 5. Antibiotics are typically produced in fed batch reactors because
Options- A. antibiotic yields are generally higher when cells enter the stationary phase
- B. the precursors are often toxic to the cells
- C. antibiotic yields are generally higher when cell growth slows
- D. All of the above Discuss
- 6. Media used for the production of chlorotetracyclin consists of
Options- A. sugar, corn steep liquor, CaCO3, (NH4)2SO4 and NH4 Cl
- B. corn steep liquor, CaCO3 and (NH4)2SO4
- C. sugar, CaCO3 and (NH4)2SO4
- D. corn steep liquor, CaCO3, (NH4)2SO4 and NH4 Cl Discuss
- 7. 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
- 8. Penicillin is recovered after fermentation as
Options- A. potassium penicillin
- B. calcium penicillin
- C. sodium penicillin
- D. penicillin only Discuss
- 9. Streptomycin is produced by
Options- A. S. griseus
- B. S. griseoflavus
- C. S. aerofaciens
- D. S. ramosus Discuss
- 10. Which of the following organism(s) produce(s) tetracycline?
Options- A. Steptomyces aureofaciens
- B. Steptomyces ramosus
- C. Nocardia sulphurea
- D. All of these Discuss
Antibiotics problems
Search Results
Correct Answer: during the second phase
Correct Answer: water
Correct Answer: all of these
Correct Answer: soybean meal, glucose, peptone, malt extract, sodium chloride
Correct Answer: All of the above
Correct Answer: sugar, corn steep liquor, CaCO3, (NH4)2SO4 and NH4 Cl
Correct Answer: aerobic fermentation
Correct Answer: potassium penicillin
Correct Answer: S. griseus
Correct Answer: All of these
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