BIOL 1107K Chapter Notes - Chapter 10: Photosystem Ii, Photosystem I, Photosystem
Document Summary
Photosynthesis: 6co2 + 6h2o c6h12o6 + 6o2, two pathways. Light energy to chemical energy (atp and nadph) Use atp and nadph and co2 to make sugars: light. Absorbed: photon acquires the energy (ground state to excited state, an electron jumps to another level, pigments. Molecules that absorb specific wavelengths in visible ranges. Plot of biological activity as a function of exposure to wavelengths. When a pigment absorbs light, energy can be . Used for a chemical reaction: antenna systems (i. e. light-harvesting complexes) Multiple antenna systems, their pigments surrounding a reaction center: electron carriers on thylakoid membrane of a chloroplast. Chl* + a chl* + a- Nadp+ + e- nadph + h: electron transport. After excitation, chlorophyll is unstable and wants electrons. Chlorophyll takes electrons from water, splitting it. Two photo systems required (i and ii) They are passed among different carriers, which then release h+ to balance charge.
