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Antibiotics

Antibiotics
At normal pH, penicillin remains in

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

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

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

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Antibiotics
The yield of the antibiotic depends upon

composition of the medium
pH of the medium
all of these
age of the inoculum

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Antibiotics
Penicillin is recovered after fermentation as

sodium penicillin
potassium penicillin
penicillin only
calcium penicillin

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Antibiotics
Which of the following precursor is added in the medium to get penicillin G?

Phenyl acetic acid
Ammonium chloride
Ammonium sulphate
Phenyl carbamic acid

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Antibiotics
Streptomycin is produced by

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

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