Transgenic Plant
The first transgenic plants expressing engineered foreign genes were tobacco plants produced by the use of

Arabidopsis thaliana
Bacillus thuringiensis
Streptomyces hygroscopicus
Agrobacterium tumefaciens

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Transgenic Plant
Which of the following has been widely used to provide resistance against plant viruses?

Virus resistance genes from bacteria
Expression of anti-virus genes in vectors that transmit viruses
Expression of ribonuclease (RNase) genes in host plants
Expression of virus coat protein genes in transgenic plants

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Transgenic Plant
In transgenic plants that have been manipulated to express patho-genesis-related (PR) proteins all the time it has been shown that

expression of two PR proteins provides some protection against a few pathogens
expression of one PR protein provides high levels of protection against many pathogens
these provide no protection at all against pathogens
these proteins trigger the production of other antimicrobial defenses

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Transgenic Plant
Expression of antisense RNA in transgenic plants is a general method used to

reduce or eliminate the expression of individual genes
block the expression of virus coat protein genes
activate the expression of all genes in a biochemical pathway
eliminate the expression of all genes in a biochemical pathway

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