 Extra Credit at the edge of my desk  Take one if you’d like  Graded for Accuracy

1) Get in Groups at lab stations 2) Conduct your Experiment 3) When you are done: 1)Finish the back of your lab with your analysis and turn it in 2)Set up cornell notes on page 32 for Enzymes 1)EQ: What are enzymes?

 Set up the next page in your journal…  Title: Enzymes  Page: 32  Date:  Essential question: What are enzymes?  Yes, Cornell notes!

 proteins that regulate cell processes ◦ help maintain homeostasis ◦ work best in specific conditions (temperature, pH, etc.)  biological catalysts ◦ catalyst: a substance that speeds up a chemical reaction  BIOLOGICAL catalysts are found in living things ◦ REDUCE the activation energy needed to start a reaction  activation energy: how much energy it takes to start a reaction

 Enzymes are biological catalysts ◦ catalyst: a substance that speeds up a chemical reaction ◦ activation energy: how much energy it takes to start a reaction

 very specific ◦ perform specialized jobs ◦ have particular shapes that only fit with particular substrates (like a lock and key)  substrate: a chemical that binds with an enzyme and changes in some way  named for their job ◦ names end in –ase ◦ EXAMPLES:  lactase (breaks down lactose)  DNA polymerase (creates DNA polymers)  protease (breaks down protein)

DRAW THIS!! (reactants)

 