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Antibiotics

Antibiotics
At acidic pH, penicillin remains in

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

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

Ammonium chloride
Ammonium sulphate
Phenyl acetic acid
Phenyl carbamic acid

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

all of these
barley seeds
wheat seeds
rice seeds

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Antibiotics
Which of the following organism(s) produce(s) tetracycline?

All of these
Steptomyces ramosus
Steptomyces aureofaciens
Nocardia sulphurea

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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)
antifoam agent
carbon source
source of nutrients

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Antibiotics
Which of the following event occurs during second phase of growth of P. chrysogenum?

Synthesis of penicillin is high
pH increase
Both (a) and (b)
Mycelial mass increases

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