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Biotechnology - 50

1-	Plants derived sexually from the same plant are____ while those derived from somatic tissue from the same plant are____.
	A -	identical, different
	B -	different, also different
	C -	different, identical
	D -	plants cannot be derived from somatic tissue
2-	Transgenic plants with increased tolerance to aluminum have been produced by making plants that
	A -	secrete phytosiderophores into the soil
	B -	make more metal-binding peptides like phytochelatins
	C -	bind aluminum to the cell wall
	D -	secrete citrate into the soil
3-	Transplastomics
	A -	targets genes in the chloroplast
	B -	provides exceptionally low yields of protein products
	C -	produces genes that are released in pollen
	D -	offers little opportunity for practical use
4-	Plants containing genes encoding cytokines and blood clotting factors are used in
	A -	nutrition improvement
	B -	pharmaceutical production
	C -	vaccine production
	D -	textile production
5-	The first transgenic plants expressing engineered foreign genes were tobacco plants produced by the use of
	A -	Agrobacterium tumefaciens
	B -	Bacillus thuringiensis
	C -	Arabidopsis thaliana
	D -	Streptomyces hygroscopicus
6-	Transgenic plants
	A -	contain foreign genes in their cells
	B -	are used to produce human antibodies
	C -	are plants that differ in geographical locations
	D -	Both (a) and (b)
7-	Low temperatures induce the expression of many cold-induced genes. Transgenic plants with improved cold tolerance have been produced by
	A -	expressing the protein that activates expression of these genes all the time in plants
	B -	cooling plants using the Peltier effect
	C -	expressing a gene for production of antifreeze (ethylene glycol) in plants
	D -	increasing evaporative cooling from leaf surfaces
8-	Nitrilase is encoded by
	A -	gene bxn in Klebsiella pneumoniae
	B -	bar gene in Streptomyces spp
	C -	Both (a) and (b)
	D -	None of these
9-	If the goal were to create a plant resistant to an insecticide, which cell-based plant technology would be most effective?
	A -	Clonal propagation
	B -	Cybridization
	C -	Protoplast fusion
	D -	Mutant selection
10-	What are the various disadvantages of cross protection?
	A -	Possibility of mutations in inducing mild virus strain
	B -	Possibility of synergism between inducing virus and other unrelated virus
	C -	Possibility of unnecessary spread of mild virus
	D -	All of the above

[Người đăng: Thành Lãm - ST]

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