25.2 MB (2.5 MB compressed)
3612 x 2442 pixels
30.5 x 20.6 cm ⏐ 12.0 x 8.1 in (300dpi)
JJP / EURELIOS / SCIENCE PHOTO LIBRARY JJP / EURELIOS / SCIENCE PHOTO LIBRARY
DNA molecule, molecular model. Deoxyribonucleic acid (DNA) consists of a long double helix of phosphates and sugars. Here, the molecular structure of the helices is shown by the pink and blue pentagons. The helices are held together by pairs of nucleotide bases (yellow rods). There are four different nucleotide bases. It is the varying sequence of these four bases along a DNA helix that forms the genetic code for that individual. A typical DNA molecule can contain a sequence that is many millions of bases long. The genetic code in DNA is the basis of all life on Earth.
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