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Prepare physical model of DNA molecule (Watson-Crick model)
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J.D.Watson and F.H.C. Crick (1953) combined the physical and chemical data, and proposed a double helix modelfor DNA molecule. This model is widely accepted. According to this model, theDNA molecule consists of two strands which are connected together by hydrogen bonds and helically twisted.
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DNA Structure | Watson and Crick's model of DNA
DNA is a two-stranded molecule. ...
Each strand has two ends; 5' end with a phosphate group and 3' end with a hydroxyl group. ...
The diameter of DNA is uniform and is around 2 nm.
The distance between each turn or the length of each spiral turn is 3.6 nm (earlier 3.4 nm).
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