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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
pH increase
Mycelial mass increases
Both (a) and (b)

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

wheat seeds
all of these
barley seeds
rice seeds

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Antibiotics
Antibiotics are typically produced in fed batch reactors because

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

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

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

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