The document discusses DNA structure and replication. It explains that DNA is made up of nucleotides containing sugar, phosphate, and a nitrogen base. The bases adenine and thymine pair together, as do cytosine and guanine. DNA takes the form of a double helix with the bases forming rungs between the spiraling sugar-phosphate backbones. DNA replication is the process where the double helix unwinds and enzymes help copy the DNA to produce two identical DNA molecules.

1. genetics

3. DNA Cloning Cancer Individualism Gene Therapy Human Genome Project DNA Fingerprinting Human Development Genetic Diseases

8. DNA is made up of steps and rails of a ladder. This is a rail This is a step or rung Green can only go with Red Purple can only go with Yellow

14. http://highered.mcgraw-hill.com/olcweb/cgi/pluginpop.cgi?it=swf::535::535::/sites/dl/free/0072437316/120076/micro04.swf::DNA%20Replication%20Fork Polymerase and Ligase are both enzymes that aid in DNA Replication

17. DNA Replication Practice