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1-
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Media composition for the production of streptomycin is
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A -
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soybean meal, glucose, peptone, malt extract, sodium chloride
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B -
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soybean meal, glucose, peptone, malt extract, ammonium chloride
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C -
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soybean meal, glucose, peptone, malt extract, calcium carbonate
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D -
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soybean meal, glucose, peptone, malt extract, ammonium sulphate
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2-
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Which of the following organism(s) produce(s) tetracycline?
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A -
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Steptomyces aureofaciens
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B -
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Steptomyces ramosus
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C -
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Nocardia sulphurea
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D -
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All of these
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3-
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Media used for the production of chlorotetracyclin consists of
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A -
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sugar, corn steep liquor, CaCO3, (NH4)2SO4 and NH4Cl
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B -
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corn steep liquor, CaCO3 and (NH4)2SO4
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C -
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sugar, CaCO3 and (NH4)2SO4
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D -
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corn steep liquor, CaCO3, (NH4)2SO4 and NH4Cl
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4-
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Which of the following precursor is added in the medium to get penicillin G?
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A -
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Phenyl carbamic acid
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B -
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Phenyl acetic acid
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C -
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Ammonium sulphate
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D -
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Ammonium chloride
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5-
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High yield of chlorotetracyclin requires
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A -
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no aeration
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B -
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continuous aeration
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C -
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aeration which does not affect the yield
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D -
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controlled aeration
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6-
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Streptomycin is produced by
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A -
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S. griseus
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B -
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S. griseoflavus
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C -
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S. aerofaciens
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D -
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S. ramosus
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7-
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Which of the following event occurs during second phase of growth of P. chrysogenum?
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A -
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Synthesis of penicillin is high
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B -
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Mycelial mass increases
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C -
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pH increase
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D -
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Both (a) and (b)
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8-
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Inoculum preparation for the fermentation medium for penicillin takes place on
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A -
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wheat seeds
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B -
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barley seeds
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C -
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rice seeds
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D -
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All of these
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9-
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Antibiotics are typically produced in fed batch reactors because
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A -
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antibiotic yields are generally higher when cells enter the stationary phase
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B -
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the precursors are often toxic to the cells
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C -
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antibiotic yields are generally higher when cell growth slows
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D -
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All of the above
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10-
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Which of the following event occurs during third phase of growth of P chrysogenum?
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A -
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Concentration of antibiotic increases in the medium
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B -
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Autolysis of the medium starts
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C -
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Slight rise in pH due to liberation of ammonia
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D -
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All of the above
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