Rather, DNA was first identified in the late 1860s ... chemical components of the four bases and other nucleotide subunits, Watson and Crick shifted molecules around on their desktops, as though ...

Sunburns and aging skin are obvious effects of exposure to harmful UV rays, tobacco smoke and other carcinogens. But the effects aren't just skin deep. Inside the body, DNA is literally being torn ...

RNA polymerase is an enzyme that is responsible for copying a DNA sequence into an RNA sequence, duyring the process of transcription. As complex molecule composed of protein subunits, RNA ...