DNA is the central storage repository for light in our body and is twisted around itself in a double helix, which can turn right or left. It belongs to the group of nucleic acids, of which there are two chains: the DNA and the RNA. DNA and RNA are built like a helix. Both strands form the structure and consist of sugars and phosphate groups that show a basic reaction.
by Dr. Mercola of http://www.mercola.com.