PRETTYMOLECULES / SCIENCE PHOTO LIBRARY PRETTYMOLECULES / SCIENCE PHOTO LIBRARY
DNA molecule. Computer artwork of a molecule of DNA (deoxyribonucleic acid). DNA is composed of two strands (silver) twisted into a double helix. Each strand consists of a sugar-phosphate backbone attached to nucleotide bases (coloured rods and spheres). There are four bases: adenine, cytosine, guanine and thymine. The bases are joined together by hydrogen bonds. DNA contains sections called genes that encode the body's genetic information.
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