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Antibiotics

Antibiotics
At normal pH, penicillin remains in

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

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Antibiotics
pH of the fermentation medium for chlorotetracyclins is

8-9
6-7
7-8
5-6

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

Slight rise in pH due to liberation of ammonia
Concentration of antibiotic increases in the medium
Autolysis of the medium starts
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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Antibiotics
The yield of the antibiotic depends upon

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

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