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ANTIBIOTICS

Antibiotics
The yield of the antibiotic depends upon

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

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Antibiotics
During which phase of growth of Penicillium chrysogenum maximum antibiotic production takes place

during the third phase
during the first phase
same in all the phases
during the second phase

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Antibiotics
Fermentation medium for oxytetracyclin (terramycin) consist of

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

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Antibiotics
pH of the fermentation medium for chlorotetracyclins is

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

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Antibiotics
At normal pH, penicillin remains in

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

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