01:119:115 Lecture Notes - Lecture 9: P680, Ferredoxin, Light-Independent Reactions
21 Apr 2016
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Document Summary
Photosynthesis - conversion of light energy into chemical (bond) energy. Everything is made of carbon, taken from atmospheric co2. Carbon fixation - photosynthetic organisms can convert co2 c based macromolecules. Photoautotrophs - use sunlight energy to make molecules from co2 (producers) Heterotrophs - consume organic molecules from environment (consumers) Light - electromagnetic energy, travels as waves: wavelength - distance from peak to peak (most biological systems use visible light because it is not destructive, photon - particle of light. B. 2. short wavelength = high energy; and vice versa. When photons transfer energy to an electron, two possible outcomes: Excited electron returns to lower orbital (ground state) by emitting heat and light. Electron can leave atom and get captured by an acceptor (example of redox reaction) Chloroplasts - photosynthetic organelle in plants (aka where it happens: chloroplast structure. A. 3. double membrane (inner and outer) stroma thylakoids: photosynthetic pigments.
