D. They cut DNA at specific sequences.
Explanation - Restriction enzymes are those enzymes that identify specific DNA sequences and cleaves them at that particular region. Restriction enzyme mainly cleaves DNA and are sometimes directed by RNA to make the incision.
Restriction enzymes are used to carry out many biotechnology related experiments. They are widely used to study DNA or genome of various organism. For different restriction sites, different restriction enzymes are there and each enzyme are chosen based on the study under consideration.
