CHEM 271 Chapter Notes - Chapter 1: Escherichia Coli, Eukaryote, Archaea
16 Apr 2016
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Members of both macro molecules (proteins and nucleic acids) and metabolites (glucose and glycerol) are common, with minor variaions, to all living things. For example, dna stores geneic info in all cellular organisms. Proteins are built from the same 20 amino acid building blocks. Also, proteins that play similar roles in diferent organisms oten have very similar three dimensional structures. Key metabolic processes also are common to many organisms. For example, the set of chemical transformaions that converts glucose and oxygen into carbon dioxide and water is essenially idenical in simple bacteria such as escherichia coli (e. coli) and human beings. All organisms are divided into 3 domains: eukarya, bacteria and archaea. Eukarya presence of a well-deined nucleus within the cell. Prokaryotes unicellular organisms, lack nucleus, like bacteria, got reclassiied into two domains. Dna is a linear polymer made up of four diferent types of monomers. The backbone is built of repeaing sugar-phosphate units.
