LIFE 102 Lecture Notes - Acetyl-Coa, Electron Transport Chain, Oxidative Phosphorylation
Document Summary
The citric acid cycle has eight steps, each catalyzed by a specific enzyme. The acetyl group of acetyl coa joins the cycle by combining with oxaloacetate, forming citrate. The next seven steps decompose the citrate back to oxaloacetate, making the process a cycle. The nadh and fadh2 produced by the cycle relay electrons extracted from food to the electron transport chain. Concept 9. 4: during oxidative phosphorylation, chemiosmosis couples electron transport to atp synthesis. Following glycolysis and the citric acid cycle, nadh and fadh2 account for most of the energy extracted from food. These two electron carriers donate electrons to the electron transport chain, which powers atp synthesis via oxidative phosphorylation. The electron transport chain is in the cristae of the mitochondrion. Most of the chain"s components are proteins, which exist in multiprotein complexes. The carriers alternate between reduced and oxidized states as they accept and donate electrons.
