BISC 220Lg Lecture Notes - Lecture 4: Lipid Bilayer, Nuclear Pore, Nuclear Membrane
6 Apr 2017
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Document Summary
Development of compartmentalization has allowed eukaryotes to do alot more than. Greater sodium concentration one side of the membrane than the other. Many membranes have proteins that are associated with it. Some exist within membrane, some associate close to it. Typically alpha helixes are associated with membrane proteins. Cube has dimension of 1, total surface area, it is h*w*b. Cube with dimension of 5, total surface is 250. Higher surface area easier to get molecules to the center because more help. Contains most of the genetic information in the cell. Able to synthesize their own proteins contained within them. Nucleus processes the instructions that allow the cell to differentiate. Transmission em: two dimensional picture, higher magnification. Nuclear envelope: double folded plasma membrane bounded inside by the nuclear lamina. Has two phospholipid bilayers, hard to penetrate. The bilayers cause a little sac (looks like er) Lamina: network of protein fibers that helps maintain shape.
