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Biotechnology - 47

1-	Which is the most common carbon source used in the plant cell culture media?
	A -	Sucrose
	B -	Glucose
	C -	Fructose
	D -	Maltose
2-	Which of the following is an ethylene biosynthesis inhibitor?
	A -	Citric acid
	B -	Succinic acid
	C -	Activated charcoal
	D -	Silver thiosulphate
3-	Nitrogen in the plant cell culture media is provided by either ammonia or nitrate salt. In the media
	A -	utilization of ammonium cause culture pH to drop while utilization of nitrate cause culture pH to rise
	B -	utilization of nitrate cause culture pH to drop while utilization of ammonium cause culture pH to rise
	C -	utilization of both ammonium and nitrate result in rise in pH
	D -	utilization of both ammonium and nitrate result in drop in pH
4-	Which of the following growth regulator is added for short initiation during plant regeneration from callus?
	A -	Auxins
	B -	Cytokinins
	C -	Gibberellins
	D -	Brassinosteroids
5-	Which of the following growth regulator promote cell division?
	A -	Auxins
	B -	Cytokinins
	C -	Gibberellins
	D -	Brassinosteroids
6-	Which of the following growth regulator is used to stimulate embryo or shoot development?
	A -	Auxins
	B -	Cytokinins
	C -	Gibberellins
	D -	Brassinosteroids
7-	Which of the following growth regulator cause plant cells to grow?
	A -	Auxins
	B -	Cytokinins
	C -	Gibberellins
	D -	Brassinosteroids
8-	Silver thiosulphate is added to culture medium as it helps to
	A -	maintain the pH
	B -	remove toxic phenolics from plant cells
	C -	prevent the gaseous plant hormone, ethylene dioxide from accumulating to detrimental condition.
	D -	All of the above
9-	In plant cell culture media, auxins and cytokinins are used in the range of
	A -	l-50μM
	B -	50-100μM
	C -	100-125μM
	D -	More than 125μM
10-	Concentration of sucrose generally used in plant cell culture media is
	A -	10-15 g/l
	B -	20-30 g/l
	C -	40-50 g/l
	D -	60-70 g/l

[Người đăng: Thành Lãm - ST]

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