Yes, but what is it used to?
make round up resistant plant and pesticide plant.
Seriously, it's straight-forward enough to test GM foods for safety.
Not the least bit. It's very hard, actually. And the actual toxicity of the plant isn't the only problem.
Actually : "Much of Monsanto's seed products are genetically modified, often to make them immune to Monsanto's "Round Up" herbicide. In a study published in the International Journal of Biological Sciences, researchers applied a different statistical analysis on raw data obtained from Monsanto and concluded that these GM corn (maize) varieties induced a state of hepatorenal toxicity.[26] They suggested that the presence of the new pesticides associated with the inserted genes were responsible, although the possibility that this could be due to a mutation during the transformation process was not excluded.[26]" Wikipedia
We banned them for a reason.