BIO 101 Lecture Notes - Lecture 19: Streptococcus, Anaerobic Respiration, Cellular Respiration
8 Apr 2016
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Document Summary
Cell walls contain peptidoyclan-protection, helps humans destroy them because we do not have it. Peptidoyclan-a complex structure composed of carbohydrate strands that are cross- linked by short chains of amino acids. Have lipid plasma bilayer with proteins, cell wall, peptidoglycan, polysaccharides. The oldest fossil -3. 5 billion years old carbon-rich deposits derived from bacteria. The oldest eukaryote fossil -1. 75 billion years old. 5000 species of archaea and bacteria formally named today some of the species of prokaryotes is us right now. 1014 bacterial and archaea cells in our stomach and intestine. Pathogenic- disease causing microorganism small fraction of bacteria living in or on use are pathogenic. Usually pathogenic bacteria affect tissues at the entry points to the body: First to establish a link between a particular species of bacterium and a specific disease. Proposed that four criteria had to be met to establish this link:
