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Antibiotics

Antibiotics
At normal pH, penicillin remains in

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

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Antibiotics
Antibiotics are typically produced in fed batch reactors because

All of these
antibiotic yields are generally higher when cells enter the stationary phase
the precursors are often toxic to the cells
antibiotic yields are generally higher when cell growth slows

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Antibiotics
Penicillin is recovered after fermentation as

sodium penicillin
potassium penicillin
calcium penicillin
penicillin only

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Antibiotics
The yield of the antibiotic depends upon

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

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

barley seeds
all of these
rice seeds
wheat seeds

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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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