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

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

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

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Transgenic Plant
Transgenic plants

both (a) and (b)
contain foreign genes in their cells
are used to produce human antibodies
are plants that differ in geographical locations

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