From which organism is the $Taq$ polymerase enzyme isolated?

Match Column-$I$ with Column-$II$ and choose the correct combination from the options given below:

Column-$I$	Column-$II$
$(a)$ Cloning vector	$(i)$ Agrobacterium
$(b)$ Ti-$DNA$	$(ii)$ pBR$322$
$(c)$ Disarmed pathogen	$(iii)$ $GAATTC$
$(d)$ Recognition sequence	$(iv)$ Transformation

Who discovered that restriction enzymes have the capability of cutting $DNA$ strands in a particular fashion,which left what has become known as 'sticky ends' on the strands?

Which of the following is known as a natural genetic engineer?

Which enzyme removes nucleotides from the ends of $DNA$?

Create a chart (with diagrammatic representation) showing a restriction enzyme,the substrate $DNA$ on which it acts,the site at which it cuts $DNA$,and the product it produces.