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Antibiotics

Antibiotics
At normal pH, penicillin remains in

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

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Antibiotics
Fermentation medium for oxytetracyclin (terramycin) consist of

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

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

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

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

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

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Antibiotics
Media used for the production of chlorotetracyclin consists of

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

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Antibiotics
Streptomycin is produced by

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

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