Which one of the following hydrolyses internal phosphodiester bonds in a polynucleotide chain?

The enzyme known as restriction endonuclease:

Which one of the following is commonly used in the transfer of foreign $DNA$ into crop plants?

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.

The enzymes which are absolutely necessary for recombinant $DNA$ technology are

Give scientific reasons: Viruses can be used in the manufacturing of proteins.