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Antibiotics

Antibiotics
Streptomycin is produced by

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

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

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Antibiotics
At normal pH, penicillin remains in

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

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Antibiotics
pH of the fermentation medium for chlorotetracyclins is

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

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Antibiotics
At acidic pH, penicillin remains in

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

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Antibiotics
Media used for the production of chlorotetracyclin consists of

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

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