Polynucleotide Chain: Difference between revisions
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A polyneucleotide chain is made up of [[Nucleotide|nucleotide]] monomer. The [[DNA|DNA]] double helix is an example of two polyneucleotide chains that are coiled together. Each monomer has three parts, a [[pentose sugar|pentose sugar]], a phosphate group and a nitrogenous base. The phosphate group and pentose sugar form a [[Phosphodiester_bond|phosphodiester linkage]] which becomes the backbone of the nucleotide chain. There are four nitrogenous bases in [[DNA|DNA]], [[adenine|adenine]], [[guanine|guanine]], [[thymine|thymine]] and [[cytosine|cytosine]]. However, in [[RNA |RNA]][[thymine|thymine]] is replaced with [[uracil|uracil]] <ref>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]</ref><ref>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]</ref>. | |||
=== References === | |||
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Latest revision as of 03:23, 20 November 2013
A polyneucleotide chain is made up of nucleotide 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 nucleotide chain. There are four nitrogenous bases in DNA, adenine, guanine, thymine and cytosine. However, in RNAthymine is replaced with uracil [1][2].
References
- ↑ 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]
- ↑ 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]