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Ethanol Production

Ethanol Production
Ethanol is produced by

none of these
batch fermentation
both (a) and (b)
continuous fermentation

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Ethanol Production
To maintain aseptic conditions during fermentation which of the following is needed?

Sterilization of air supply
Sterilization of fermentor
Aeration and agitation
All of these

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Ethanol Production
Which of the following organism is not used in any of the traditional industrial fermentation?

Pseudomonas
E. coli
Bacillus
Yeast

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Ethanol Production
High ethanol concentration

inhibits bacterial growth
promotes bacterial growth
promotes yeast growth
inhibits yeast growth

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Ethanol Production
Candida utilis is used for the fermentation of waste sulphate liquor since it ferments

both hexoses and pentoses
hexoses only
pentoses only
none of these

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Ethanol Production
The Zygomonas has a merit over yeast because

All of these
it has high tolerance to ethanol
it has more specific growth rate
it has more osmotic tolerance to higher sugar concentration

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