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Ethanol Production

Ethanol Production
Ethanol is produced by

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

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

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

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

Sparger
Baffles
Impeller
All of these

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Ethanol Production
The fermentor can be sterilized by

steam under pressure
all of these
boiling
keeping it in the oven

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

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

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

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

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