Polynucleotide Chain

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A polyneucleotide chain is made up of neucleotide monomer. The DNA double helix is an example of two polyneucleotide chains that are coiled together. Each monomer has three parts, a pentose sugar, a phosphate group and a nitrogenous base. The phosphate group and pentose sugar form a phosphodiester linkage which becomes the backbone of the neucleotide chain. There are four nitrogenous bases in DNA, adenine, guanine, thymine and cytosine. However, in RNA thymine is replaced with uracil.

 

References

1. Professor John Blamire, 1999. The Giant Molceules of Life [online] Availbale at:http://www.brooklyn.cuny.edu/bc/ahp/SDPS/SD.PS.polynuc.html [Accessed 13/11/13]

2. Pearson Education, Inc. Concept 2 Review: The Polynucleotide Chain [online] Available at:http://www.phschool.com/science/biology_place/biocoach/dnarep/polynuc.html [Accessed 13/11/13]

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