PHYS 1100 : Test 2 Part 1 4
Document Summary
Metabolism: the sum of all anabolic and catabolic reactions, anabolism: energy using, biosynthesis, catabolism: energy producing. Oxidation-reduction: oxidation: loss of electrons, reduction: gaining electrons, redox reactions are always coupled. Catabolism: the energy released from redox reactions is stored in molecules and transported where needed, short term energy storage, atp, derivitaves of coenzyme a- thioester bonds. The protons travel back across the membrane via atp synthase. Atp synthase uses this proton motive force to attach an inorganic phosphate group to adp to create atp: photophosphorylation: photosynthesis. Fermentation vs. respiration: similarities, both use energy from redox reactions to make atp, differences, respiration has an electron acceptor, respiration generates much more atp, fermentation has no electron acceptor. The carbon dioxide is excreted from the cell as a fermentation waste product. Two more reactions result in the ribulose 5-phosphate being split into acetyl phosphate (2 carbon molecule) and glyceraldehyde 3-phosphate (3 carbon molecule, same intermediate as in glycolysis).
