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Antibiotics

Antibiotics
Chlorotetracyclin is soluble in

ether
organic solvents
all of these
water

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Antibiotics
Which of the following precursor is added in the medium to get penicillin G?

Ammonium chloride
Phenyl acetic acid
Phenyl carbamic acid
Ammonium sulphate

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Antibiotics
At normal pH, penicillin remains in

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

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Antibiotics
Streptomycin is produced by

S. griseus
S. griseoflavus
S. aerofaciens
S. ramosus

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Antibiotics
The yield of the antibiotic depends upon

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

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

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

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