DR TIM EVANS / SCIENCE PHOTO LIBRARY DR TIM EVANS / SCIENCE PHOTO LIBRARY
DNA molecule. Computer model of a molecule of deoxyribonucleic acid (DNA). Atoms are represented as spheres and are colour-coded: carbon (green), oxygen (orange), phosphorus (pink), nitrogen (blue) and hydrogen (white). The molecule consists of two sugar-phosphate strands (green, pink and orange), that spiral around each other to form a double helix, linked by the interactions between pairs of nucleotide bases (blue) along their length. DNA contains sections called genes that encode the body's genetic information.
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