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

A. for next fermentation
B. as single-cell protein for animal feed
C. as manure
D. all of the above

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7. The fermentor can be sterilized by

A. keeping it in the oven
B. steam under pressure
C. boiling
D. all of these

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8. Candida utilis is used for the fermentation of waste sulfate liquor since it ferments

A. hexoses only
B. pentoses only
C. both hexoses and pentoses
D. none of these

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9. Yeast is used in the production of

A. ethyl alcohol
B. acetic acid
C. cheese
D. curd

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10. S cerevisiae start producing ethanol within

A. 10 h
B. 12 h
C. 15 h
D. 24 h

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