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Biotechnology - 66

1-	Candida utilis is used for the fermentation of waste sulphate liquor since it ferments
	A -	hexoses only
	B -	pentoses only
	C -	Both hexoses and pentoses
	D -	None of these
2-	Yeast is used in the production of
	A -	ethyl alcohol
	B -	acetic acid
	C -	cheese
	D -	curd
3-	Which of the following microorganisms help in the ethanol production?
	A -	Saccharomyces cerevisiae
	B -	Zygomonas mobilis
	C -	Saccharomyces uvarum
	D -	All of these
4-	S cerevisiae start producing ethanol with in
	A -	10 h
	B -	12 h
	C -	15 h
	D -	24 h
5-	After the fermentation is over, ethanol is recovered by
	A -	centrifugation
	B -	distillation
	C -	filtration
	D -	cell disintegration
6-	The Zygomonas has a merit over yeast because
	A -	it has more osmotic tolerance to higher sugar concentration
	B -	it has high tolerance to ethanol
	C -	it has more specific growth rate
	D -	All of the above
7-	Which of the following organism is not used in any of the traditional industrial fermentation?
	A -	E. coli
	B -	Yeast
	C -	Bacillus
	D -	Pseudomonas
8-	How is air supply to the fermentor sterilized?
	A -	By heat filtration
	B -	Filtration through fibrous material
	C -	Filtration through granular material
	D -	All of the above
9-	What are the fermentation conditions for the ethanol production?
	A -	pH 6; temperature 35°C
	B -	pH 5; temperature 35°C
	C -	pH 6; temperature 30°C
	D -	pH 5; temperature 30°C
10-	Which of the following is used for agitation in a fermentor?
	A -	Impeller
	B -	Baffles
	C -	Sparger
	D -	All of these

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