BIOL240 Lecture Notes - Lecture 2: Ftsz, Jerky, Dd-Transpeptidase
21 Dec 2017
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Document Summary
Not a good predictor of physiology, ecology or phylogeny. Morphology may be determined by selective forces: nutrient uptake efficiency, sprials allow efficient swimming in viscous or turbulent fluids, gliding motility. Bacteria can also assume multicellular organizations: hypae (branching filaments of cell, mycelia (tufts of hyphae, trichomes (smooth, unbranched chains of cells) Prokaryotes are 0. 2 um to 700 um ini diameter. Most rod shaped bacteria between 0. 5 um to 4. 0 um wide and 15 um long. Eukaryotic cells ranges from 10 um to >200 um. Minimum size simply due to minimum space requirements for genome, proteins, ribosomes. There are expections to general bacterial size: thiomargarita namibiensis: 700 um in diameter, epulopiscium fishelson : 200 700 um x 10 um. Not cultured, identified by 16r rrna sequence, related to clostridium. 700 um long compared the eukaryotic paramecium = 75 um. Greater rate of nutrient/waste exchange per unit volume.
