Chemical Reactions in Metabolic Processes

Chemical Reactions in Metabolic Processes - Chemical...

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Chemical Reactions in Metabolic Processes In order for a chemical reaction to take place, the reacting molecules (or atoms) must  first collide and then have sufficient energy (activation energy) to trigger the formation of  new bonds. Although many reactions can occur spontaneously, the presence of a  catalyst accelerates the rate of the reaction because it lowers the activation energy  required for the reaction to take place. A  catalyst  is any substance that accelerates a  reaction but does not undergo a chemical change itself. Since the catalyst is not  changed by the reaction, it can be used over and over again. Chemical reactions that occur in biological systems are referred to as  metabolism. Metabolism  includes the breakdown of substances (catabolism), the  formation of new products (synthesis or anabolism), or the transferring of energy from  one substance to another. Metabolic processes have the following characteristics in 
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This note was uploaded on 12/04/2011 for the course ANTHRO 2000 taught by Professor Monicaoyola during the Fall '10 term at Broward College.

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