Biology 2601A/B Lecture Notes - Lecture 6: Vascular Bundle, Ferredoxin, Three Steps
26 Oct 2013
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Document Summary
Autotrophs make food from sunlight and some other energy sources. Heterotrophs use the food to do work. Photosynthesis most important biological process on earth. Every spring, photosynthesis begins and when carbon dioxide is being consumed, there is a fall and plants respire, causing carbon dioxide concentrations to increase. Molecules that absorb photons: generally colored (the reflected wavelengths) Absorption of the photon increases the energy level of the molecule. Color of pigment is not indicative of what they are absorbing, it is indicative of what they are reflecting. Blue photon high excited state, emits some heat, and falls back down to lower excited state. Red photon low excited state, not gaining as much energy as blue photon, which returns to ground state by fluorescence (loss of energy by the emission of light of longer wavelength) Absorption spectrum of a plant (or leaf pigment extract) describes how much a pigment is absorbing a particular wavelength of light.
