ALFRED PASIEKA / SCIENCE PHOTO LIBRARY ALFRED PASIEKA / SCIENCE PHOTO LIBRARY
DNA molecule. Wire-frame computer artwork representing part of a strand of DNA (deoxyribonucleic acid) with its genetic code. DNA contains all the inherited instructions necessary for the development and functioning of living organisms. The DNA molecule is composed of two spiral strands of sugar phosphates joined by pairs of cross-linking nucleotide bases (linked spheres). The sequence of these bases, represented by the letters A, C, G and T, makes up the unique genetic code of each organism.
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