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24.9 MB (1.3 MB compressed)
3508 x 2480 pixels
29.7 x 21.1 cm ⏐ 11.7 x 8.3 in (300dpi)
ROBERT BROCKSMITH / SCIENCE PHOTO LIBRARY ROBERT BROCKSMITH / SCIENCE PHOTO LIBRARY
DNA molecule. Computer artwork of a molecule of DNA (deoxyribonucleic acid). DNA is composed of two strands twisted into a double helix. Each strand consists of a sugar-phosphate backbone (orange) attached to nucleotide bases (multicoloured rods). There are four bases; adenine, cytosine, guanine and thymine. DNA contains sections called genes that encode the body's genetic information.
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