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

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

rice seeds
barley seeds
all of these
wheat seeds

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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
All of these
antibiotic yields are generally higher when cell growth slows

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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
All of these
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

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

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