BIOL 1000 Chapter Notes - Chapter 2: Hydrogen Sulfide, Nuclear Membrane, Cell Membrane
21 Apr 2014
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Document Summary
Cell theory: all organisms are composed of one or more cells, the cell is the smallest unit that has the properties of life, cells arise only from the growth and division of preexisting cells. Double stranded helical molecule , contains unique alphabet that provides instructions for assembling many of the important components of a cell organism. Dna is copied onto rna, which directs the production of protein molecules. Info pathway is preserved form gen to gen. Changes in dna is what contributes to evolution. Redox reactions were among the first energy releasing reactions. Earliest evidence of life found in structures called stromatolites- layered rock that is formed when microorganisms bind particles of sediment together. Prokaryotes have properties common to all cells. All life forms are based on prokaryotic(unicell) and eurkaryotic(multi cell) Prokaryotic are split into two domains:archaea and bacteria. All cells have a plasma membrane which separates the env from the cytoplasm. Dna structure is different between eukaryotes and prokaryotes.
