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Antibiotics

Antibiotics
Streptomycin is produced by

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

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Antibiotics
The yield of the antibiotic depends upon

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

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

rice seeds
wheat seeds
barley seeds
all of these

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

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

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

Concentration of antibiotic increases in the medium
Slight rise in pH due to liberation of ammonia
Autolysis of the medium starts
All of these

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

Phenyl acetic acid
Phenyl carbamic acid
Ammonium sulphate
Ammonium chloride

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