Biology 1002B Lecture Notes - Lecture 12: Cellular Respiration, Endomembrane System, Euglena
15 Apr 2017
School
Department
Course
Professor
Document Summary
Eukaryotes can do much more than bacteria and archaea. Bacteria have been around for so long but they still are not nearly as complex as eukaryotes. Within a single cell, a eukaryote can do: Eukaryote cells are much bigger, 200 times larger then a prokaryote cell and they can do more stuff and they"re mot complex. What drove the evolution of eukaryotes: orange cell can do oxidative phosphorylation (oxphos) and the grey cell can"t. Proton motive force (pmf): gradient of concentration and charge. The volume must be supported by the oxphos. There is not enough plasma membrane surface to put units of oxphos: as a ball gets bigger, the surface area to volume ratio goes down. In eukaryotes oxidative phosphorylation units don"t occur on the plasma membrane, there"s no constraint. Because mitochondria is the site for oxidative phosphorylation because they have a gigantic surface area. Problem with this surface area and volume hypothesis is .
