BIOL 1000 Chapter Notes - Chapter 7: Carbohydrate, Electronegativity, Chemiosmosis
Document Summary
Photosynthetic organisms are photoautotrophs and are primary producers of earth. They convert energy of sunlight into chem. energy and make simple inorganic molec. into complex organic molecules. Photoautotrophs serve as direct or indirect food for consumers (animals, humans) Eventually the bodies of primary producers and consumers provide chem. energy for bacteria, fungi and other decomposers. Light-dependant reactions capturing of sunlight by pigment molec. and using that energy to produce nadph and atp. This process requires an etc chain that uses electrons donated from water. 2h2o+ light energy 4h+ + 4e- + o2. Calvin cycle electrons carried by nadph and energy of atp are used to convert carbon dioxide from inorganic to organic form, process called carbon fixation. This conversion is a reduction where electrons and protons are added to carbon dioxide. 3-carbon sugar are major product of calvin cycle. 3-carbon sugars can combine to make 6=carbon sugars (glucose) 6co2 + 12h2o c6h1206 + 602 + 6h2o.
