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ANTIBIOTICS

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

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

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

wheat seeds
barley seeds
rice seeds
all of these

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Antibiotics
Antibiotics are typically produced in fed batch reactors because

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
All of these

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

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Antibiotics
Vegetable oil, (corn oil or soybean oil) added in the fermentation medium for penicillin, act as

antifoam agent
source of nutrients
carbon source
both (a) and (c)

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