Double Helix The double helix of the DNA is shown along with details of how the bases, sugars and phosphates connect to form the structure of the molecule. DNA is a double-stranded molecule twisted into a helix (think of a spiral staircase). Each spiraling strand, comprised of a sugar-phosphate backbone and attached bases, is connected to a complementary strand by non-covalent hydrogen bonding between paired bases. (Watson, 1968) The bases are adenine (A), thymine (T), cytosine (…showed first 75 words of 2250 total…

…showed last 75 words of 2250 total…Crick, F. H. C. 1962. The genetic code. Scientific American 207(4):66-74. Gamov, George. 1955. Information transfer in the living cell. Scientific American 193(4):70-78. Golomb, S. W., Basil Gordon and L. R. Welch. 1958. Comma-free codes. Canadian Journal of Mathematics 10:202-209. Golomb, Solomon W., Betty Tang and Ronald L. Graham 1987. A new result on comma-free codes of even word length. Canadian Journal of Mathematics 39(3):513-526. James D. Watson, The Double Helix, (New York:Atheneum, 1968) Louis Levine, "DNA Replication," Encarta 97 (1996)