BIOL 2004 Lecture 2: L2 - Prokaryote Cell Organization
11 Mar 2017
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Today we"re talking about the last three points of Anchored in to the cell membrane, or outer membrane, or both! Complex protein assemblies often have a transmembrane element extending into the external environment. A unique structure consisting of filaments and the basal body. It is common for there to be multiple flagella around the cell . Lophotrichous = a tuft of bacterial flagella (dozens of individuals) at the ends of a cell in tufts. Ring of motor proteins in cell membrane, surrounding the rotor. All counter clockwise: flagellar bundle forms, straight-line "run" Random walk can be biased by altering the frequency of random tumbles in response to a cue! Ex: chemotaxis - move towards a chemical attractant. The cytoplasm is the site of many enzymatic reactions! Is inside a nucleoid, not a separate nucleus. There is no sharp separation between the nucleoid and the cytoplasm! This explains why there is coupled transcription and translation.
