Added by Caroline Harcourt, last edited by Caroline Harcourt on 22 Nov, 2006

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DNA or Deoxyribose nucleic acid is a long polymer of nucleotides (cytosine, guanine, adenine, and thymine) that usually takes the form of a double helix. DNA carries genetic information, which determines the behaviour of cells in living organisms. DNA is responsible for the transmission of inherited traits between generations.