BIOL 1201 Lecture Notes - Lecture 22: Light-Independent Reactions, Photosystem I, Photosystem Ii
23 Oct 2014
School
Department
Course
Professor
Document Summary
6co2 + 12h2o + light - - > 6o2 + c6h12o6 + 6h2o. Convert 2 low energy molecules into a high energy molecule. It is all happening in the organelle chloroplast. Capture light energy in chemical energy (light reactions) Use the chemical energy to convert co2 into glucose (dark reactions) (calvin cycle) Non- cyclic: electrons flow from point a to point b. Special versions of chlorophyll a (p700 or p680) Sunlight is shining on it and it isn"t just one wavelength. Need pigments of different colors to absorb different wavelengths. Green in plants is because they aren"t absorbing it. Using the energy of light to form hydrogen ion gradient that makes atp. The tricky step is when a plant can convert a photon of light energy into something else. H2o - - > photosystem 2- - > cytochrome complex - - > photosystem 1 - - > nadph - - > calvin cycle (dark reactions)
