BIO 102 Lecture Notes - Lecture 7: Oxygen Evolution, Primary Production, Carbon Fixation
10 Oct 2016
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Cyanobacteria atp synthesis: energy comes from light and the electrons are taken from water. Photosynthesis: uses 2 light absorbing steps and 2 types of reaction centers. Light: part of the electromagnetic spectrum of energy made of waves of photon packets of light energy. Purple/blue has the highest energy (of visible light) Gamma rays x-rays ultraviolet rays infared rays radar fm tv shortwave am. Plant pigments can be extracted and then separated by chromatography to display the pigment composition. Structures of plant pigments: photosynthetic pigments are mostly hydrophobic which makes them associate with the thylakoid membrane. Pigment absorbance: the full absorbance is due to the combined absorbance of many pigments. Photosynthesis light reactions occur in cyanobacteria and chloroplasts. This structure: free living cyanobacteria or as an endosymbiosed organelle is a photosynthetic machine. Photosynthesis occurs in chloroplasts: chloroplasts have 2 membranes. Also internal flattened, vesicle like membranes called thylakoids usually form into pressed ribbons/stacks called grana.
