Biology 1002B Lecture Notes - Lecture 12: Bacterial Genome, Euglena, Oxidative Phosphorylation
28 Jan 2020
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Complexity, eukaryotes have more complex traits than prokaryotes, ex, dna recombination, introns and exons, nucleus, cytoskeleton, Endomembrane system, intercellular signaling, endocytosis: evolution is slow and stepwise, no intermediates between prokaryotes and bacteria, metabolic and biological virtuosity, a metabolic pathway created from a chain of enzymes, not the same as morphological complexity. Eukaryotes can have a huge nuclear genome: eukaryotes can have a genome that is 1,000 times to 10,000 times better than a prokaryotes, almost as if bacterial genome size is constrained. Path towards eukaryotes involves o2: earliest bacteria were anaerobic, 2. 2 bya get cyanobacteria (oxygenic photosynthesis, bacteria that undergo aerobic respiration appeared due to the new levels of oxygen. It s really about power: proton motive force (pmf, gradient of concentration, eukaryotes have a much greater power per gene (fw) than prokaryotes, . 03 v. 57. 15. Giant bacteria: epulopiscium, thiomargarita, neither are more complex than e. Coli. , just larger: cannot overcome morphological barrier.
