CHEM 271 Chapter Notes - Chapter 15: Phosphocreatine, Oxidative Phosphorylation, Atp Hydrolysis
3 May 2016
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Document Summary
Highly integrated network of chemical reactions collectively known as metabolism. Metabolism has a coherent design containing many common motifs. The number of kinds of reactions is small and the mechanisms quite simple. Metabolism is composed of many coupled, interconnecting reactions. Living organisms require energy: (1) the performance of mechanical work in muscle contraction and cellular movements, (2) the active transport of molecules and ions, and (3) the synthesis of macromolecules and other biomolecules from simple precursors. Metabolism is essentially a sequence of chemical reactions that bgins with a particular molecule and results in the formation of some other molecule or molecules in a carefully defined fashion. Pathways are interdependent, and their activity is coordinated by exquisitely sensitive means of communication in which allosteric enzymes are predominant. We can divide metabolic pathways into two broad classes: (1) those that convert energy from fuels into biologically useful forms, and (2) those that require inputs of energy to proceed.
