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Ethanol Production

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

Bacillus
Pseudomonas
Yeast
E. coli

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Ethanol Production
As the fermentation for the ethanol production is over, the cells are separated to get the biomass of yeast cells that is used

as single cell protein for animal feed
for next fermentation
All of these
as manure

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Ethanol Production
What are the fermentation conditions for the ethanol production?

pH 6; temperature 35°C
pH 5; temperature 35°C
pH 6; temperature 30°C
pH 5; temperature 30°C

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Ethanol Production
The Zygomonas has a merit over yeast because

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

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Ethanol Production
High ethanol concentration

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

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

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

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