BIOL108 Lecture Notes - Lecture 11: Oxidative Phosphorylation, Nuclear Membrane, Cell Membrane

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BIOL108 Full Course Notes
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BIOL108 Full Course Notes
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Aerobic respiration evolved- allowed for more efficient energy production. Due to oxidative phosphorylation = more atps: greater structural diversity. Abundant oxygen allowed the cells to produce collagen. Collagen - connective tissue that binds cells together, making multicellular life forms possible things like shells, cuticles, carapaces all demand substantial amount of collagen; therefore need a lot of o2 to produce. Dna in linear chromosomes in membrane bound nucleus. Much larger (50-500 m) than prokaryotes (1-10 m) Shows that eukaryotes overcome limits of diffusion by having specific transport mechanisms (microtubules) inside the cell. Origin of eukaryotic cells infolding of cell membrane resulted in the formation of: Ancestral host cell engulfed an endosymbiotic aerobic heterotrophic prokaryote - endosymbiont theory the prokaryote used o2 & organic matter to produce energy; eventually became the mitochondrion of the host cell. Others engulfed photosynthetic prokaryotes- who used light & co2 to make organic compounds (most likely cyanobacteria) Evolved into photosynthetic protists (e. g. algae) & plants.

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