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Ethanol Production

Ethanol Production
Which of the following is used for aeration in a fermentor?

Baffles
Sparger
All of these
Impeller

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Ethanol Production
If starch containing substrates are used for ethanol production, yeast strain can't be used directly because

it is converted to pentose sugar
None of these
it doesn't contain amylases to hydrolyze starch
starch is not a suitable substrate for the production of ethanol

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Ethanol Production
Yeast is used in the production of

ethyl alcohol
cheese
acetic acid
curd

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

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

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

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

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Ethanol Production
S cerevisiae start producing ethanol with in

24 h
10 h
12 h
15 h

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