Biology 1002B Lecture Notes - Lecture 1: Chlamydomonas Reinhardtii, Chlamydomonas, Channelrhodopsin
20 Mar 2016
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Document Summary
Uses light for energy and informaion: ability to sense and respond to external environment. Chloroplast: eyespot: organelle within the chloroplast on the plasma membrane. Model system: small and grows quickly, simple, can easily be mutated. Tree of life diverged early on to give rise to branches of higher order plants: does not share many traits with plants other than being photosyntheic. Sexual recombinaion is a response to stressful environment. Volvox: genome is very similar to that of chlamy despite mulicellularity. All cells are polarized: outside of the cell is more posiively charged than the inside. Channelrhodopsin: allows calcium ions and protons to move through the membrane in the presence of light photons. Depolarizaion of the plasma membrane: acion potenial moves to the lagella and allows the cell to move, rhodopsin is found within rod and cone cells in the eye. Both from a common ancestor: simple vs. primiive.
