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Antibiotics

Antibiotics
Streptomycin is produced by

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

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

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

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Antibiotics
Antibiotics are typically produced in fed batch reactors because

antibiotic yields are generally higher when cells enter the stationary phase
All of these
the precursors are often toxic to the cells
antibiotic yields are generally higher when cell growth slows

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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
Chlorotetracyclin is soluble in

water
organic solvents
ether
all of these

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Antibiotics
Fermentation medium for oxytetracyclin (terramycin) consist of

CSL, (NH4)2 SO4, sodium chloride and CaCO3
CSL, starch, (NH4)2 SO4, sodium chloride and CaCO3
CSL,(NH4)2 SO4, ammonium chloride and CaCO3
CSL, starch,(NH4)2 SO4, ammonium chloride and CaCO3

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