Ascientist has inserted a gene into a plasmid. which enzyme should she use to join the sticky ends of the gene and the plasmid?
restriction enzyme
ligase
rna polymerase

The question is asking to choose among the following choices that states the enzymes that should be use to join the sticky ends of the gene and the plasmid, And in my own observation, I would say that the answer would be Ligase.  I hope you are satisfied with my answer and feel free to ask for more 

not acceptable ; not welcome

Explanation:

I took a cookie from my baby brother and it was unacceptable.