BIO 150 Lecture Notes - Lecture 8: Endergonic Reaction, Sucrase, Sucrose
Document Summary
Sucrose will not break down into glucose and sucrose on it"s own because the energy of activation is too high. Enzymes act as catalysts to speed up a chemical reaction. Sucrase will hydrolyze sucrose to glucose and frutose within seconds. Most enzymes are proteins however examples of ribozyme based rna have been discovered. Enzymatic reactions can be regulated by substrate, product, and enzyme concentration. Enzymes allow reactions to occur by lowering the activation energy. Specific substrate(s) bind to an enzyme in the active site of the enzyme. Adding more substrate will increase the rate of reaction until the point when the enzyme is saturated. Each enzyme has a maximum rate of reaction (how fast it can work) Competitive molecule (inhibitor) slows down the reaction - binds to active site. Noncompetitive inhibitor - slows down/stop reaction - binds to different site (the allosteric site) Several factors affect the activity of an enzyme ph .
