01:119:115 Lecture 20: Photosynthesis
25 Feb 2016
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Document Summary
Photoautotrophs- use sunlight to make organic molecules from co2=producers (unicellular eukaryotes, purple sulfur bacteria) Enough e to be successful but not destructive. Photons are e that can be absorbed by e- --> energized e- Energized e- shift from lower e orbital to higher e orbital. Return to lower e orbital (ground state) i) ii) Photosynthetic organelle in eukaryotic cells derived from cyanobacteria. Captures light e for photosynthesis embeded in thylakoid membrane. Absorb wavelength of light not absorbed by chloryphyll a. Widen spectrum of light that ca provde e for photosynthesis. Each pigment absorbs light e at specific wavelenth. Anglemens - used bacteria to seek out oxygen to determine. Water on both sides can be simplified to reverse of respiration equation. Convert light e into chemical e as atp and nadph (nadph is like nadh just has an extra phosphate. Has pair of chlorophyll a transfer e- to e- accepteir. Psii chlorp phyll absorbs best at p600 nm.
