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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
Both (a) and (b)
pH increase

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

rice seeds
wheat seeds
barley seeds
all of these

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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
antibiotic yields are generally higher when cells enter the stationary phase
the precursors are often toxic to the cells

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

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

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

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

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