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THE DNA STRANDS

Every cell in the human body contains 23 pairs of chromosomes, each a packet of compressed and entwined DNA. Each strand of DNA consists of repeating nucleotide units. Ordinarily, DNA takes the form of a highly regular double-stranded helix. Each strand of the double helix serves as a template for the synthesis of a new strand. Each new double helix is a twin, an exact replica, of its parent. (Figure and caption text provided by the LBL Human Genome Center.)

For more information please visit: http://www.ornl.gov/sci/techresources/Human_Genome/

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