The discovery of
enzymes that could
cut and paste DNA
made genetic
engineering
possible.
Restriction
enzymes, found
naturally in
bacteria, can be
used
(more)
The discovery of enzymes that could cut and paste DNA made genetic engineering possible. Restriction enzymes, found naturally in bacteria, can be used to cut DNA fragment at specific sequences, while another enzyme, DNA ligase, can attach or rejoin DNA fragments with complementary ends.
