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Antibiotics

Antibiotics
Chlorotetracyclin is soluble in

all of these
ether
water
organic solvents

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Antibiotics
The yield of the antibiotic depends upon

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

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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?

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

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Antibiotics
High yield of chlorotetracyclin requires

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

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Antibiotics
Antibiotics are typically produced in fed batch reactors because

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

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