Hacking Life's Code with Recombinant DNA

We can literally hack life's code. Scientists take a tiny DNA circle from bacteria and

use "molecular scissors" to snip it open. Then, they find a useful gene,

like one for pest resistance, and glue it into that open circle. This creates a new

hybrid molecule called recombinant DNA. They put this new DNA back into a

host cell, like another bacterium, and let it multiply like crazy. This is how we get

bacteria to produce human insulin for diabetics or how we create crops that are naturally

resistant to pests. We are literally rewriting the rules of biology.