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metabolism the sum of all the chemical reactions that take place within an organism
enzyme a protein catalyst that speeds up chemical reactions
catalyst a substance that speeds up a reaction without itself being used in a reaction
features of enzymes 1. made of protein 2. correct shape to fit substrate (lock-and-key model) 3. reversible
substrate the substance an enzyme acts upon
product the substance the enzyme forms in a reaction
factors that affect enzyme activity (or can denature enzymes) 1. temperature 2. pH
denatured enzyme an enzyme that lost its shape and no longer function; can be caused by extreme temperatures or changes in pH
active site Where the substrate locks into the enzyme, creating a perfect fit or "lock-and-key" model
Created by: jamie burke