Biology 1002B Lecture Notes - Lecture 10: Chemiosmosis, Cyanobacteria, Archaea
23 Aug 2017
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Lecture 10: bacteria and archaea are very different organisms and do not share a common ancestor, although both groups are recognized as prokaryotes (no morphological complexity, eukaryotes are more complex than prokaryotes. Eukaryotic traits (although some might be found in prokaryotes, eukaryotes have all of these): dna recombination. Introns and exons: nucleus like structure, dynamic cytoskeleton. Intercellular signaling: endocytosis, wh(cid:455) ha(cid:448)e(cid:374)"t (cid:271)a(cid:272)teria e(cid:448)ol(cid:448)ed to (cid:271)e (cid:373)ore (cid:272)o(cid:373)ple(cid:454) after all these (cid:455)ears, 4 bya first anaerobic bacteria 2. 2 bya cyanobacteria oxygenic photosynthesis aerobic bacteria (have an advantage over anaerobic because they make much more. Eukaryotes are not constrained to only the surface are of the organism: bacteria developed massive amounts of internal structures there"s large a(cid:373)ou(cid:374)t of surface area (lots of oxphos units). So why are they still small: the importance of proximity: some genes required for chemiosmotic membrane need to be in close proximity to the membranes themselves, more chemiosmotic units= more gene copies, ex.
