EEMB 3 Lecture Notes - Lecture 7: Anaerobic Respiration, Intermembrane Space, Photophosphorylation
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21 Apr 2019
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Anabolism biosynthesis / production of macromolecules. 1) energy source (atp) oxidize organic compounds ( chemo ), convert solar energy into chemical energy ( photo ) 2) carbon source inorganic co2 or organic c. Autotroph use inorganic co2 as carbon source. Heterotroph use organic c as carbon source. Inside = negative charge & alkaline: atp synthase regulates flow of protons back into the interstitial space to phosphorylate adp to atp. Anaerobic because they only have photosystem 1 & not psii (splits water to create oxygen) Photoautotrophs (some) use co2 for c source & light energy is used to split h2s and h2 instead of water purple sulfur bacteria. Photoheterotrophs (many) use light for energy & organic c for c source purple non sulfur bacteria. Z scheme light excites molecules that activate reaction center that splits water & excites electron that goes through etc to generate atp. O2 attacks bonds of organic matter why organisms developed antioxidant mechanisms.
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