62.4 MB (2.6 MB compressed)
5433 x 4016 pixels
46.0 x 34.0 cm ⏐ 18.1 x 13.4 in (300dpi)
PAUL WOOTTON / SCIENCE PHOTO LIBRARY PAUL WOOTTON / SCIENCE PHOTO LIBRARY
Cellular packaging of DNA. Artwork of a strand of the genetic material DNA (deoxyribonucleic acid, right) unwound from a chromosome (centre). The chromosome is a condensed form of DNA that forms during cell division. DNA is located within the nucleus of cells in a form called chromatin, and a cell and its nucleus are shown at upper left. The DNA in a cell nucleus, which is less than 0.1 millimetres across, is over 2 metres in length when unravelled. This model of a DNA strand shows the double helix structure of two spiralling sugar phosphate strands joined by pairs of nucleotide bases (coloured bars).
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