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Antibiotics

Antibiotics
At normal pH, penicillin remains in

aqueous phase
precipitates
solvent phase
both (a) and (b)

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Antibiotics
Vegetable oil, (corn oil or soybean oil) added in the fermentation medium for penicillin, act as

carbon source
both (a) and (c)
antifoam agent
source of nutrients

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Antibiotics
Media used for the production of chlorotetracyclin consists of

corn steep liquor, CaCO3, (NH4)2SO4 and NH4 Cl
sugar, CaCO3 and (NH4)2SO4
corn steep liquor, CaCO3 and (NH4)2SO4
sugar, corn steep liquor, CaCO3, (NH4)2SO4 and NH4 Cl

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Antibiotics
Inoculum preparation for the fermentation medium for penicillin takes place on

rice seeds
barley seeds
all of these
wheat seeds

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Antibiotics
Streptomycin is produced by

S. griseoflavus
S. ramosus
S. griseus
S. aerofaciens

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Antibiotics
Which of the following changes occur during first phase of growth of Penicillium chrysogenum?

Lactic acid present in the corn steep liquor is utilized at the maximum rate
Growth of mycelia occurs
All of these
Ammonia is liberated in the medium

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