01:119:115 Lecture Notes - Lecture 10: Photosynthetic Pigment, Light-Harvesting Complex, Thylakoid
31 Mar 2016
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Photosynthesis: (10/2) life made of carbon-based molecules source of c is co2. Use e from the sun: photoautotrophs, use sunlight to make organic molecules, = producers, heterotrophs = consumers. I: light light is a form of electromagnetic energy all radiation travels as waves. Return to lower e orbital (ground state: emit heat, emit light (fluorescence) longer wavelength and lower energy than original light source. Leave atom, captured by acceptor (redox reaction: occurs in photosynthesis. Chloroplast structure: see photo, has dna and ribosomes. Photosynthetic pigments: pigment: any substance that absorbs visible light, photosynthetic pigment: Multistep process with overall equation: photosynthetic redox reaction. Uses ps ii first, then ps i. Linear e- flow: 8 steps involves: redox reactions. Photophosphorylation using light e to make atp: 1. No redox reactions yet: 2. e- transfer excited e- in p680 transferred to primary e- acceptor. P680+ is an extremely strong oxidizing agent h2o is oxidized (photolysis)
