The molecular scissors of $DNA$ are:

Which organism is used as a vector to introduce specific genes into host plants?

Which vector is useful for gene transfer in plants?

The $DNA$ polymerase of $Thermus$ $aquaticus$ is:

Given below are two statements.
Statement $I$: Restriction enzyme $BamHI$ has its recognition site in $tet^R$ region of $pBR322$.
Statement $II$: $E. coli$ having $pBR322$ with a desired $DNA$ if inserted at $BamHI$ site can grow in medium containing tetracycline.
In the light of the above statements, choose the correct answer from the options given below.

Would you choose an exonuclease while producing a recombinant $DNA$ molecule?