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Antibiotics

Antibiotics
Streptomycin is produced by

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

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

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Antibiotics
Fermentation medium for oxytetracyclin (terramycin) consist of

CSL, starch,(NH4)2 SO4, ammonium chloride and CaCO3
CSL,(NH4)2 SO4, ammonium chloride and CaCO3
CSL, (NH4)2 SO4, sodium chloride and CaCO3
CSL, starch, (NH4)2 SO4, sodium chloride and CaCO3

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

wheat seeds
all of these
barley seeds
rice seeds

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Antibiotics
At acidic pH, penicillin remains in

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

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Antibiotics
At normal pH, penicillin remains in

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

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