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1-
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The crushed grapes are known as
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A -
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malt
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B -
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must
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C -
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wort
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D -
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sonti
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2-
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The yield of the antibiotic depends upon
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A -
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pH of the medium
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B -
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age of the inoculum
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C -
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composition of the medium
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D -
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All of these
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3-
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During which phase of growth of Penicillium chrysogenum maximum antibiotic production takes place
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A -
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during the first phase
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B -
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during the second phase
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C -
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during the third phase
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D -
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same in all the phases
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4-
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Fermentation medium for oxytetracyclin (terramycin) consist of
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A -
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CSL, starch, (NH4)2 SO4, sodium chloride and CaCO3
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B -
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CSL, (NH4)2 SO4, sodium chloride and CaCO3
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C -
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CSL, starch,(NH4)2 SO4, ammonium chloride and CaCO3
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D -
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CSL,(NH4)2 SO4, ammonium chloride and CaCO3
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5-
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pH of the fermentation medium for chlorotetracyclins is
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A -
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5-6
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B -
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6-7
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C -
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7-8
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D -
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8-9
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6-
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At normal pH, penicillin remains in
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A -
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aqueous phase
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B -
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solvent phase
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C -
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precipitates
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D -
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Both (a) and (b)
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7-
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At acidic pH, penicillin remains in
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A -
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aqueous phase
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B -
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solvent phase
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C -
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precipitates
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D -
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Both (a) and (b)
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8-
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Chlorotetracyclin is soluble in
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A -
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organic solvents
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B -
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water
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C -
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ether
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D -
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All of these
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9-
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Penicillin is produced by
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A -
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aerobic fermentation
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B -
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anaerobic fermentation
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C -
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aerobic fermentation followed by anaerobic fermentation
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D -
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anaerobic fermentation followed by aerobic fermentation
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10-
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Penicillin is recovered after fermentation as
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A -
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calcium penicillin
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B -
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potassium penicillin
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C -
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sodium penicillin
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D -
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penicillin only
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