BIOL-M 250 Lecture Notes - Lecture 8: Ammonia, Phospholipid, Lipid Bilayer
Document Summary
Immune cells secrete radicals & hydrogen peroxide ex) bleach: sodium hypochlorite, hydrogen peroxide: reactive oxygen protection: superoxide dismustase(soda): enzyme that detoxifies radicals (2h2o2+ 2h20 + o2) catalase(katf): enzymes that converts hydrogen peroxide to water(2h2o2+ 2h20+o2) Radiation: uv light is powerful mutagen(forms thymine-thymine dimers in. Ionizes most common molecule in the cell (water). Which then attacks the largest molecule in the cell. Ex ) acid mine runoff: has acidophiles that live at ph 0. Pressure: at high pressure, dna replication fails unclear why: ex) barophiles: can live at extreme pressure 5000-11000 meters in depth. Antibiotics: specifically target structure or reactions required for bacterial but not human growth: lecture 15: nutrient transport. Phototrophic: synthesize everything form basic precursors, robust & easy to culture. Adding a toxin? one parameter is intolerable (ex: temp, Nonculturable: in some environments >99% can"t be cultured o2, salt?) Liquid media: test tube/flask, reproducible, high cell density. Solid media: petri plates, individual colonies: colonies on solid media.
