Transgenic Plant
Which of the following gene is transferred to plants that detoxify the herbicide atrazine?

All of these
Nitrilase
Phosphinothrium acetyl transferase
Glutathione S-transferase (GST)

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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 proteins trigger the production of other antimicrobial defenses
these provide no protection at all against pathogens

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