Biology 1002B Lecture Notes - Lecture 2: Chlamydomonas Reinhardtii, Photochemistry, Channelrhodopsin
26 Jan 2016
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Document Summary
Light is an energy source and provides information to organisms about their surrounding physical world: example of this is chlamydomonas reinhardtii. Contains single large chloroplast that harvests light energy to make molecules through photosynthesis eyespot that allows individual cells to gather information about the location/intensity of a light source: cells can then move. Each cell contains an toward/away from the light, to optimize light harvesting for photosynthesis. Most commonly defined as the portion of the electromagnetic spectrum that humans can detect with their eyes (about 400-700nm) For chlorophyll, there is a higher excited state and a lower excited state. If electron in ground state absorbs blue light, and the energy absorbed matches exactly the energy needed to move to an excited state, the electron will do so lost the excited state electron after its heat loss. Photochemistry: using the excited state electron to drive a photochemical change.
