Which among the following is a molecular scissors?

All of these

a-Hind II

b-EcoRI

c-Hind III

d-All of these is the correct option.

Today we know more than 900 restriction enzymes that have been isolated from over 230 strains of bacteria each of which recognise different recognition sequences. The first restriction endonuclease is –Hind II. EcoRI and Hind III are also restriction endonuclease .EcoRI comes from Escherichia coli RY 13.