DNA Base Pairing
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Deoxyribonucleic acid (DNA) encodes the genetic information of all known living organisms. The structure of DNA is a double helix, consisting of two polymeric chains of ribose units connected by phosphate linkages. Each ribose unit is bonded to one of four bases: the purines adenine (A) and guanine (G) and the pyrimidines thymine (T) and cytosine (C). The two strands of the helix are connected by hydrogen bonds, with unique pairing between the bases A-T and G-C. The genetic code is specified by a particular sequence of A, G, T and C bases. For example, a fragment ⋯GATTACA⋯ in one strand, is paired with the complementary sequence ⋯CTAATGT⋯ in the other. Human DNA contains slightly more than 3 billion base pairs.
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Contributed by: S. M. Blinder (February 2018)
Open content licensed under CC BY-NC-SA
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"DNA Base Pairing"
http://demonstrations.wolfram.com/DNABasePairing/
Wolfram Demonstrations Project
Published: February 5 2018