Biology 1002B Lecture Notes - Lecture 10: Chloroplast, Archaea, Oxidative Phosphorylation
11 Apr 2016
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Document Summary
Bacteria and archaea used to be lumped together as prokaryotes (we don"t use this term anymore, and these two groups are never lumped together anymore) You could argue that eukaryotes are more complex than archaea and bacteria. Bacteria and archaea do have very complex biochemistry and biosyntheic pathways that make awesome molecules that eukaryotes don"t: biochemically, bacteria and archaea are more complex; but structurally, they are much less complex than eucarya. The earliest bacteria were anaerobic, evolved 4 billion years ago: they would"ve had to be anaerobic because there was no oxygen in the air. 2. 2 bya you get cyanobacteria, using oxygenic photosynthesis (evoluion of psi and psii) following that, you get bacteria that undergo aerobic respiraion (with oxygen as the terminal electron acceptor) The problem with geing bigger has to do with surface area volume. The oxphos sits on the membrane, and it becomes a sa:volume problem.
