MICR 3164 Lecture Notes - Lecture 6: Facultative Anaerobic Organism, Membrane Transport Protein, Facilitated Diffusion
8 May 2016
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Generally, the most stable environment for cell: hypotonic, the solute concentration of the external environment is lower than that of the cells internal environment. Net direction of osmosis is form the hypotonic solution into the cell. Cells without cell walls swell and can burst: hypertonic, the environment has a higher solute concentration than the cytoplasm. Will force water to diffuse out of the cell. Different oxygen requirements: varying oxygen requirements from top to bottom there"s a lot at the top and none at the bottom. Strict- grows where there is the most o2 present at the top. Strict anaerobe- grows best where there is no o2 present. Aerotolerant anaerobe- doesn"t care if there is o2 present or not. Binary fission, asexual: one cell becomes two, parent cell enlarges, duplicates its chromosomes, starts to pull its cell envelope to the center of the cell, cell eventually forms a central septum.
