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DNA. Computer artwork of a DNA (deoxyribonucleic acid) double helix and a historical drawing of a male figure by Leonardo da Vinci (1452-1519). The spiralling strands of the DNA helix (orange) are composed of complex chemical groups called nucleotides. Complementary pairing between the base groups (red, blue, green, yellow) of nucleotides on opposite strands holds the helix together. The sequence of the four base groups (adenine, cytosine, guanine, thymine) along the DNA helix is unique for every individual. Known as the genetic code, it provides the instructions necessary for the development and functioning of all organisms.
May 13th, 2013
Viewed 5 Times - Last Visitor from Palo Alto, CA on 07/04/2014 at 2:44 AM
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