MBIO 1010 Lecture Notes - Lecture 9: Clostridium, Endospore, Peptidoglycan
28 Dec 2017
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Inclusion bodies held in single membrane vesicles this is not considered an organelle. Because they are insoluble they cannot affect the rest of the osmolarity of the cytoplasm. They are walled off in the cytoplasm without affecting the balance within the cytoplasm. Carbon storage polymers: poly- -hydroxybutyrate (phb, lipid storage, glycogen granules, polymer of glucose. Intracellular graules of fe3o4 or fe3s4: gives the cell magnetic properties, allows it to orient itself in a magnetic field, magnetotaxis: bacteria migrate along earth"s magnetic field. Allows the cells to orient themselves according to the magnetic field: ex: bacteria are in water environments (typically aquatic bacteria) prefer low o2 concentration. They use magnetotaxis to move down to sediments with lower o2 concentration. 2. 16 endospores: endospores, highly differentiated cells resistant to heat, harsh chemicals, and radiation, dormant stage of bacterial life cycle, ideal for dispersal via wind, water, or animal gut (stomach acids) Bacterial endospores: produced only by some gram positives, ex: bacillus sp.
