MCB 2610 Lecture Notes - Lecture 10: Lipid Bilayer, Membrane Transport Protein, Cw Complex
8 Dec 2017
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Chapter overview: morphology of bacterial cells, the cytoplasm, the bacterial cytoskeleton, the cell envelope, the bacterial cell surface, bacterial taxonomy. Morphology of bacterial cell: bacteria can take many different shapes (or morphologies) Pleiomorphic (varied shapes: bacteria can also assum multicellular organizations. Trichomes (smooth, unbranched chains of cells: size of bacteria can vary greatly. Usually smaller than eukaryal cells (bacteria are often 0. 5-5 micrometers in length: there are exceptions to the general size of bacterial cells. Thiomargarita manibiensis: up to 700 micrometers in diameter. Epulopiscium fishelsoni: 200-700 micrometers x 80 micrometers. Some mycoplasma calle are only 0. 2 micrometers in diameter. As the s/v ratio increases, nutrient uptake and diffusion of molecules become more efficient. Large size may be protective mechanism from predation. Rod shaped cells have a higher s/v than coccus shape so greater nutrient flux across the membrane. Cell organization bacteria: cytoplasm, cell envelope, enternal structures.
