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Antibiotics

Antibiotics
At acidic pH, penicillin remains in

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

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

barley seeds
all of these
wheat seeds
rice seeds

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Antibiotics
The yield of the antibiotic depends upon

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

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Antibiotics
Media used for the production of chlorotetracyclin consists of

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

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Antibiotics
pH of the fermentation medium for chlorotetracyclins is

5-6
8-9
6-7
7-8

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

Nocardia sulphurea
All of these
Steptomyces aureofaciens
Steptomyces ramosus

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