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Deoxyribonucleic acid (DNA) is a nucleic acid that contains the genetic instructions for the construction of other cell components such as proteins and RNA used in the development and functioning of all known living organisms and many viruses. The main role of DNA is the long-term storage of genetic information. The DNA segments that code for proteins or RNA are called genes, whereas other DNA sequences have structural purposes, or are involved in regulating the use of this genetic information. - wikipedia   see also citizendium DNA and DNA Draft

DNA_orbit_animated.gif -
Animation of the structure of a section of DNA.
The bases lie horizontally between the two spiraling strands.

DNA information : The Double Helix Game : History of DNA Researchw
James D. Watson w and Francis Crickw : Maurice Wilkins w : Rosalind Franklin w and Raymond Goslingw
Watson and Crick paper, “A Structure for Deoxyribose Nucleic Acid”. Nature 171: 737–738. [pdf]
Franklin and Gosling paper, “Molecular Configuration in Sodium Thymonucleate”. Nature 171: 740–741. [pdf]

back to:  chromosome : plasmids : transformation: transduction : conjugation : transposons

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