This document discusses biotechnology and genetic engineering. It defines biotechnology as using cells to produce products like pharmaceuticals and using organisms like bacteria to protect the environment. It then explains recombinant DNA as combining DNA from different sources, like inserting human genes into bacteria, to produce useful products. Vectors like plasmids and viruses are used to insert foreign genes into host cells. Restriction enzymes cut DNA at specific sites to facilitate recombination of genes. Examples are given of pharmaceuticals, crops, and research produced through genetic engineering techniques.