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Total Questions : 92 | Page 6 of 10 pages
Question 51. Penicillin is recovered after fermentation as
  1.    potassium penicillin
  2.    penicillin only
  3.    calcium penicillin
  4.    sodium penicillin
 Discuss Question
Answer: Option A. -> potassium penicillin
Question 52. Chlorotetracyclin is soluble in
  1.    organic solvents
  2.    all of these
  3.    water
  4.    ether
 Discuss Question
Answer: Option C. -> water
Question 53. Penicillin is produced by
  1.    anaerobic fermentation followed by aerobic fermentation
  2.    aerobic fermentation followed by anaerobic fermentation
  3.    anaerobic fermentation
  4.    aerobic fermentation
 Discuss Question
Answer: Option D. -> aerobic fermentation
Question 54. Which of the following organism(s) produce(s) tetracycline?
  1.    Steptomyces aureofaciens
  2.    Steptomyces ramosus
  3.    All of these
  4.    Nocardia sulphurea
 Discuss Question
Answer: Option C. -> All of these
Question 55. High yield of chlorotetracyclin requires
  1.    aeration which does not affect the yield
  2.    continuous aeration
  3.    controlled aeration
  4.    no aeration
 Discuss Question
Answer: Option B. -> continuous aeration
Question 56. Which of the following precursor is added in the medium to get penicillin G?
  1.    Ammonium chloride
  2.    Ammonium sulphate
  3.    Phenyl carbamic acid
  4.    Phenyl acetic acid
 Discuss Question
Answer: Option D. -> Phenyl acetic acid
Question 57. Streptomycin is produced by
  1.    S. griseoflavus
  2.    S. ramosus
  3.    S. griseus
  4.    S. aerofaciens
 Discuss Question
Answer: Option C. -> S. griseus
Question 58. Media used for the production of chlorotetracyclin consists of
  1.    sugar, CaCO3 and (NH4)2SO4
  2.    corn steep liquor, CaCO3, (NH4)2SO4 and NH4 Cl
  3.    corn steep liquor, CaCO3 and (NH4)2SO4
  4.    sugar, corn steep liquor, CaCO3, (NH4)2SO4 and NH4 Cl
 Discuss Question
Answer: Option D. -> sugar, corn steep liquor, CaCO3, (NH4)2SO4 and NH4 Cl
Question 59. Which of the following event occurs during second phase of growth of P. chrysogenum?
  1.    Mycelial mass increases
  2.    Both (a) and (b)
  3.    Synthesis of penicillin is high
  4.    pH increase
 Discuss Question
Answer: Option B. -> Both (a) and (b)
Question 60. Vegetable oil, (corn oil or soybean oil) added in the fermentation medium for penicillin, act as
  1.    both (a) and (c)
  2.    carbon source
  3.    antifoam agent
  4.    source of nutrients
 Discuss Question
Answer: Option C. -> antifoam agent

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