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Unformatted text preview: thymine. Notice that the carbon atoms in one of the nucleotides diagrammed below have been numbered. The diagram below shows how nucleotides are joined together to form a "chain" of nucleotides. DNA is composed of two strands in which the bases of one strand are hydrogen-bonded to the bases of the other. The sugar-phosphate groups form the outer part of the molecule while the bases are oriented to the center. The strands are twisted forming a configuration that is often referred to as a double helix . The photograph below is of a model of DNA....
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- Fall '10
- Nucleic Acids