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Antibiotics

Antibiotics
pH of the fermentation medium for chlorotetracyclins is

7-8
6-7
5-6
8-9

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Antibiotics
Which of the following changes occur during first phase of growth of Penicillium chrysogenum?

Growth of mycelia occurs
Lactic acid present in the corn steep liquor is utilized at the maximum rate
Ammonia is liberated in the medium
All of these

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Antibiotics
The yield of the antibiotic depends upon

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

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Antibiotics
Penicillin is recovered after fermentation as

penicillin only
calcium penicillin
potassium penicillin
sodium penicillin

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Antibiotics
Which of the following organism(s) produce(s) tetracycline?

All of these
Nocardia sulphurea
Steptomyces aureofaciens
Steptomyces ramosus

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Antibiotics
Inoculum preparation for the fermentation medium for penicillin takes place on

all of these
barley seeds
wheat seeds
rice seeds

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