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Antibiotics

Antibiotics
At acidic pH, penicillin remains in

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

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Antibiotics
The yield of the antibiotic depends upon

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

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Antibiotics
During which phase of growth of Penicillium chrysogenum maximum antibiotic production takes place

same in all the phases
during the second phase
during the first phase
during the third phase

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Antibiotics
pH of the fermentation medium for chlorotetracyclins is

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

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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
Chlorotetracyclin is soluble in

organic solvents
all of these
ether
water

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