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Antibiotics

Antibiotics
At acidic pH, penicillin remains in

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

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

Both (a) and (b)
Synthesis of penicillin is high
Mycelial mass increases
pH increase

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Antibiotics
Streptomycin is produced by

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

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Antibiotics
Media used for the production of chlorotetracyclin consists of

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

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Antibiotics
High yield of chlorotetracyclin requires

no aeration
continuous aeration
aeration which does not affect the yield
controlled aeration

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Antibiotics
At normal pH, penicillin remains in

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

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