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Antibiotics

Antibiotics
At normal pH, penicillin remains in

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

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Antibiotics
Media used for the production of chlorotetracyclin consists of

sugar, corn steep liquor, CaCO3, (NH4)2SO4 and NH4 Cl
corn steep liquor, CaCO3 and (NH4)2SO4
corn steep liquor, CaCO3, (NH4)2SO4 and NH4 Cl
sugar, CaCO3 and (NH4)2SO4

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Antibiotics
Penicillin is recovered after fermentation as

potassium penicillin
sodium penicillin
calcium penicillin
penicillin only

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Antibiotics
At acidic pH, penicillin remains in

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

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

Ammonium chloride
Phenyl acetic acid
Ammonium sulphate
Phenyl carbamic acid

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Antibiotics
Chlorotetracyclin is soluble in

organic solvents
water
all of these
ether

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