1. Chemical Reactions & Enzymes - Means to write that information down.

2. Chemical Reactions and Enzymes 0 As we have seen, living things are made of chemical compounds (Biomolecules), but more importantly chemistry isn’t just what life is made of, chemistry is also what life does.

3. Chemical Reactions 0 Chemical reaction – Change of substances into different ones by breaking and forming of chemical bonds. 0 The chemicals that start a chemical reaction are the reactants. 0 The chemicals produced by a chemical reaction are called products.

4. Energy in Reactions 0 Activation energy is the amount of energy that needs to be absorbed to start a chemical reaction.

5. Two paths will take you to the same end location. Which one will take less energy to get there and will happen faster?

6. 0 Catalysts are substances that speed up chemical reactions. 0 decrease activation energy 0 increase reaction rate

7. Enzymes 0 Enzymes are special proteins in living organisms that work as catalysts. 0 Enzymes function best in a small range of conditions. 0 Changes in temperature or pH (acidity) can damage (denature) enzyme structure. 0 An enzyme’s function depends on its structure.

8. 0 An enzyme’s structure allows only certain reactants to bind to the enzyme. –Substrates (reactants) –Active site (location of reaction on enzyme) substrates (reactants) enzyme Substrates bind to an enzyme at certain places called active sites. Substrate binds to the active site on the enzyme. AKA “lock and key”

9. Substrates bind to an enzyme at certain places called active sites. The enzyme brings substrates together and weakens their bonds. The catalyzed reaction forms a product that is released from the enzyme.

10. Enzymes 0 Enzymes speed up chemical reactions that take place in cells. 0 Enzymes are very specific, catalyzing only one chemical reaction. 0 Lock and Key concept 0 One Enzyme can catalyze or speed up multiple reactions 0 Enzymes are recyclable

11. Enzymes - In Summary Digestive Enzyme Basics Short & basic enzyme animation Enzyme Videos Enzyme Function How Enzymes Work Activation Energy - Snowman

12. Name of Enzyme:Where Found:Function: In your journal, list the major enzymes found within our digestive system. Use pages 978-984. (Mouth-1, Stomach-1, Pancreas-3, Small Intestine-4) Name of Enzyme:Where Found:Function: Salivary AmylaseMouthBreak down starches PepsinStomachBreak down proteins AmylasePancreasContinue breaking down starch TrypsinPancreasContinues breaking down protein LipasePancreasBreaks down fat MaltaseSmall Intestine Disaccharides into monosaccharides SucraseSmall Intestine LactaseSmall Intestine PeptidaseSmall IntestineDipeptides into Amino Acids