What are molecular scissors? Explain their role.

Explanation

(a) Restriction endonucleases are the enzymes known as molecular scissors because restriction enzymes cut either at ends or at specific pallindromic sequences with in DNA.

(b) Restriction enzymes are used in recombinant DNA technology because they can cut the specific site of host as well as vector DNA. These enzymes inspect the DNA length and cut at little away from centre in pallindromic sequence thus leaving the sticky ends.