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MCQs

Total Questions : 92 | Page 5 of 10 pages
Question 41. At normal pH, penicillin remains in
  1.    aqueous phase
  2.    solvent phase
  3.    both (a) and (b)
  4.    precipitates
 Discuss Question
Answer: Option A. -> aqueous phase
Answer: (a).aqueous phase
Question 42. Which of the following changes occur during first phase of growth of Penicillium chrysogenum?
  1.    Growth of mycelia occurs
  2.    Ammonia is liberated in the medium
  3.    Lactic acid present in the corn steep liquor is utilized at the maximum rate
  4.    All of the above
 Discuss Question
Answer: Option D. -> All of the above
Answer: (d).All of the above
Question 43. At acidic pH, penicillin remains in
  1.    aqueous phase
  2.    solvent phase
  3.    both (a) and (b)
  4.    precipitates
 Discuss Question
Answer: Option B. -> solvent phase
Answer: (b).solvent phase
Question 44. The yield of the antibiotic depends upon
  1.    all of these
  2.    composition of the medium
  3.    pH of the medium
  4.    age of the inoculum
 Discuss Question
Answer: Option A. -> all of these
Question 45. During which phase of growth of Penicillium chrysogenum maximum antibiotic production takes place
  1.    during the first phase
  2.    same in all the phases
  3.    during the third phase
  4.    during the second phase
 Discuss Question
Answer: Option D. -> during the second phase
Question 46. PH of the fermentation medium for chlorotetracyclins is
  1.    6-7
  2.    5-6
  3.    8-9
  4.    7-8
 Discuss Question
Answer: Option B. -> 5-6
Question 47. Fermentation medium for oxytetracyclin (terramycin) consist of
  1.    CSL, starch,(NH4)2 SO4, ammonium chloride and CaCO3
  2.    CSL,(NH4)2 SO4, ammonium chloride and CaCO3
  3.    CSL, starch, (NH4)2 SO4, sodium chloride and CaCO3
  4.    CSL, (NH4)2 SO4, sodium chloride and CaCO3
 Discuss Question
Answer: Option C. -> CSL, starch, (NH4)2 SO4, sodium chloride and CaCO3
Question 48. At normal pH, penicillin remains in
  1.    precipitates
  2.    aqueous phase
  3.    solvent phase
  4.    both (a) and (b)
 Discuss Question
Answer: Option B. -> aqueous phase
Question 49. At acidic pH, penicillin remains in
  1.    aqueous phase
  2.    solvent phase
  3.    both (a) and (b)
  4.    precipitates
 Discuss Question
Answer: Option B. -> solvent phase
Question 50. Media composition for the production of streptomycin is
  1.    soybean meal, glucose, peptone, malt extract, calcium carbonate
  2.    soybean meal, glucose, peptone, malt extract, ammonium sulphate
  3.    soybean meal, glucose, peptone, malt extract, ammonium chloride
  4.    soybean meal, glucose, peptone, malt extract, sodium chloride
 Discuss Question
Answer: Option D. -> soybean meal, glucose, peptone, malt extract, sodium chloride

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