Biology 1202B Lecture Notes - Lecture 4: Electron Hole, Chloroplast, Photosystem Ii
30 Apr 2012
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Document Summary
Light is a form of energy that travels in waves: photons particles of light that have a fixed quantity of energy. Amount of energy is inversely proportional to their wavelength. Autotrophic self feeding organisms that do not consume other organisms as an energy source: light is their energy source (ex: photoautotroph) Heterotrophic eat other organisms as an energy source. Pigments in eukaryotes: chlorophylls (a, b, c, d) green, carotenoids (carotene) red, xanthophyll"s orange/yellow. Absorption spectrum: spectrophotometer - measures the % absorption of a particular pigment at a particular wavelength of light. Action spectrum: plots some measure of photosynthetic rate against wavelength of light, not identical to absorption spectrum of chlorophyll since other pigments are present. Tissue localization: any green tissue such as leaves, stems, roots, compartments. Placement and location of leaves for maximum efficiency. Light-dependent reactions: also called light reactions and photochemical reactions: these occur in the thylakoid membranes and need light to occur, produce energy.
