Biotechnology Can Be Defined as the Use of Living Organisms

Biotechnology can be defined as the use of living organisms to create products or to facilitate process. Restriction enzymes are one kind of tool required by this technology. What roles do restriction enzymes play?

A) They break down all DNA molecules randomly.
B) They are used to break down the cell membrane of bacterial cell.
C) They break down all protein molecules inside the bacterial cell.
D) They cut DNA at specific sites.