BIO 3124 Lecture Notes - Lecture 7: Lipid Bilayer, Archaea, Dna Supercoil
15 Sep 2016
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Slide 2: nucleoid: supercoiling dna, but its accessible. No nucleus so dna aggregates: cytosol: liquid portion of cytoplasm, endospore, they have protein membranes compartments that store energy or carbon, phosphate etc. They may have a lipid compartment, but not phospholipid bilayer. Lecture 3: the inclusions and granules serve as energy reserves and reservoirs of structural building blocks. Storage of carbon or other substances in an insoluble inclusion will reduce osmotic stress of the cell. Slide 4: carbon can be stored in the polymers; one example is phb polymer (poly beta-hydroxybutyric acid). The phb monors bond together by ester linkages to form polymer which aggregate in granules. They are synthesized when there is excess of carbon and the carbons used when there is no energy available. The generic name for these polymers is pha. Depending how much carbon are stored, the cell size can change. Some bacteria will need phosphates (sources for nucleic acid and phospholipid synthesis)
