Each nucleotide is made of three parts; a nitrogen containing organic base, a pentose sugar and one or more phosphate groups. ... The nucleotides in each polynucleotide chain are joined together between the phosphate group of one nucleotide and the hydroxyl group on carbon 3 of the sugar on another nucleotide. ... DNA also has a degenerate code which means that there is more than one triplet code for the same amino acid. ... A gene is a section of DNA codes for polypeptides ( a sequence of amino acids) which combine to make proteins. ... A silent mutation is where the base change codes for t...

• Word Count: 1977
• Approx Pages: 8
• Grade Level: Undergraduate

While heme is the prosthetic group that can reversibly bind to oxygen, globin is the protein that encloses and safeguards the heme molecule. ... Each member of the group are either turned "on" or "off" during different stages of development. ... The only difference between these two genes products is a single amino acid. ... The £]-globin locus also contains a single pseudogene, £r £]1, within the group. ... All five functional genes of the beta-globin locus encodes products that are 146 amino acids long and contain two correspondingly sized introns at exactly the same ...

• Word Count: 1387
• Approx Pages: 6
• Grade Level: Undergraduate