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Antibiotics

Antibiotics
At normal pH, penicillin remains in

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

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Antibiotics
High yield of chlorotetracyclin requires

aeration which does not affect the yield
controlled aeration
no aeration
continuous aeration

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Antibiotics
Media used for the production of chlorotetracyclin consists of

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

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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
Inoculum preparation for the fermentation medium for penicillin takes place on

wheat seeds
barley seeds
all of these
rice seeds

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

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

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