SB1b. Explain how enzymes function as catalysts.

ENZYME FOLDABLE Label top left: Step 1, top right: Step 2, bottom right: Step 3, bottom left: Step 4 Label active site, enzyme, enzyme substrate complex, product, & substrates 2 3 1 4

Tab 1: Key Vocab Enzyme – protein that catalyzes chemical reactions for organisms. Substrate – reactant in a chemical reaction upon which an enzyme acts. Active site – where the enzyme binds.

Tab 2 – Reactions Write the reaction: A + B  C + D Label the reactants & products Underneath write: Endothermic – absorbs heat Exothermic – releases heat

Tab 3: Factors that Affect Enzymes Temperature (can denature) pH (can denature) Concentration of substrate

Tab 4: Examples of biological enzymes Insulin – used for diabetics Pepsin Lipase Many, many more

Center Fold Enzyme are NOT used up and are reuseable. Enzymes are VERY specific they will ONLY work with the right substrate. Enzyme break chemical bonds. Enzymes lower activation energy- or energy needed to start a reaction.

Back Draw a reaction graph like the one below Label where the reactants, products, & activation energy is on the graph. Add a dotted line to represent the change that occurs with the addition of an enzyme.