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

Ammonium sulphate
Phenyl acetic acid
Ammonium chloride
Phenyl carbamic acid

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Antibiotics
Media composition for the production of streptomycin is

soybean meal, glucose, peptone, malt extract, sodium chloride
soybean meal, glucose, peptone, malt extract, ammonium chloride
soybean meal, glucose, peptone, malt extract, calcium carbonate
soybean meal, glucose, peptone, malt extract, ammonium sulphate

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