A double helix is the structural arrangement of DNA, which looks something like an immensely long ladder twisted into a helix, or coil. The sides of the "ladder" are formed by a backbone of sugar and phosphate molecules, and the "rungs" consist of nucleotide bases joined weakly in the middle by hydrogen bonds.
Related category• BIOCHEMISTRY
Source: National Human Genome Research Institute
Home • About • Copyright © The Worlds of David Darling • Encyclopedia of Alternative Energy • Contact