Biology 1201A Chapter Notes - Chapter 12: Guanine, Photographic Film, Base Pair
5 Oct 2015
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Document Summary
Why it matters taking dna structures from ancient fossils and being able to enhance the understanding of genetics and the composition of the modern population. Two signi cant problems (1) dna subject to damage and contamination, (2) the double helix subject to breakages in one or both strands in addition to inappropriate cross-linking and chemical modi cation of individual bases. Living cells can successfully prevent or repair dna damage, frozen adna can be preserved well. Natural degradation of dna occurs because adna sequences remaining in a given tissue sample are very rare and prone to contamination. He called substance nuclei, now deoxyribonucleic acid , hereditary molecule is dna. James d. watson, francis h. c. crick used chemical and physical information about dna to make a 3d model, using franklin"s analysis of the arrangement of atoms in dna, they created the model that t the terms. The structure showed how genetic information is stored and how dna is replicated.
