BSC 2010 Lecture Notes - Lecture 7: Globular Protein, Sucrase, Enzyme
4 Sep 2019
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Document Summary
Enzymes (42- 51) serve as catalysts to biochemical reactions. Catalysts speeds up reaction (increases the rate of reaction) w/o being used up or altered. Most biological catalysts are enzymes, though some are special kinds of catalytic rna molecules called ribozymes. Many of the spontaneous reactions upon which living things rely on occur at very slow rates: energy barrier prevents spontaneous reactions from occurring instantaneously. Sucrase is an enzyme that speeds up the reaction into seconds! Many exergonic reactions require an energy input (ea) to get the reaction started. The ea will put the reactions into a transition states . Ea determines the rate of the reaction reaction does not begin until it goes through a transition state where ea is added. Presence of a catalysts: catalysts speed up the rate of the reaction by lowering the ea. Does not change delta g, or the amount of free energy. Enzymes are globular protein (have complex tertiary and quaternary structures).
