MCB 2610 Chapter Notes - Chapter 2 & 4: Unicellular Organism, Thiomargarita, Cytoskeleton
8 Sep 2016
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Bacteria can take many different shapes (or morphologies: spherical, rod-shaped, comma-shaped, spiral, pleiomorphic (varied shapes, hyphae (rbranching filaments of cells, mycelia (tufts of hypae, trichomes (smooth, unbranched chains of cells; only foud in cyanobacteria) Small eukaryal cells are usually >5 um in diameter. Thiomargarita namibiensis up to 700 um in diameter. Some mycoplasma cells are only 0. 2 um in diameter. We need a microscope to see most bacteria. Size/shape relationship: as the s/v ratio increases, nutrient uptake and diffusion of molecules become more efficient. Bacterial cell organization: not as complex as eukaryotic cells, no membrane bound nucleus, lacking a lot of the same organelles as eukaryotes, cytoplasm components. The nucleoid (only 1 singular chromosome supercoiled to fit into the cell; there are few exceptions to this, however) Avery welch mcb 2610 microbiology week 6-7 chapter 2 & 4 bacteria & archaea. Common in all cells; cells have different inclusion bodies based on their function.
