LIFE 102 Lecture Notes - Cellular Respiration, Oxidative Phosphorylation, Glycolysis
Document Summary
Nadh passes the electrons to the electron transport chain. Unlike an uncontrolled reaction, the electron transport chain passes electrons in a series of steps instead of one explosive reaction. O2 pulls electrons down the chain in an energy-yielding tumble. The energy yielded is used to regenerate atp. Glycolysis (breaks down glucose into two molecules of pyruvate) The citric acid cycle (completes the breakdown of glucose) Oxidative phosphorylation (accounts for most of the atp synthesis) The process that generates most of the atp is called oxidative phosphorylation because it is powered by redox reactions. Oxidative phosphorylation accounts for almost 90% of the atp generated by cellular respiration. A smaller amount of atp is formed by glycolysis and the citric acid cycle by substrate- level phosphorylation. Concept 9. 2: glycolysis harvests chemical energy by oxidizing glucose to pyruvate. Glycolysis ( splitting of sugar ) breaks down glucose into two molecules of pyruvate. Glycolysis occurs in the cytoplasm and has two major phases:
