1. Biology Discussion Notes Thursday 10/30/2014

2. Goals for the Day 1.Be able to determine the reactants and products of a chemical equation. 2.Be able to define activation energy 3.Be able to DRAW & describe what an enzyme is and what it does

3. Question of the Day 10/30 What are the 3 things that affect enzyme activity?

4. ENZYMES Three things that effect enzyme activity 1.Temperature 2. pH (acidic or basic) 3. Concentration (how many enzymes are working)

5. Enzymes Enzyme – A protein that acts as a catalyst Catalyst – a substance that speeds up a chemical reaction without being used up or destroyed. Enzymes are responsible for almost ALL chemical reactions in living things (Organisms).

6. Catalase 2H 2 O 2 Catalase 2H 2 O + O 2

7. Enzymes How does an enzyme speed up a chemical reaction? ENZYMES speed up a chemical reaction by lowering the activation energy ()()

8. Enzymes ENZYMES speed up a chemical reaction by lowering the activation energy (the amount of energy required to start a reaction) ENERGY TIME ACTIVATION ENERGY Products Reactants ACTIVATION ENERGY with ENZYME

9. Enzymes Why do we put the enzyme above the arrow, and not on the side of the reactants or products? Example of a chemical equation Reactants Product AB A + B ENZYME

10. ENZYMES Enzymes do not ever get used up. Enzymes do not die, but they can denature – the _________ is changed and they become unusable, ruined, and no longer work

11. ENZYMES Question: If an enzyme is denatured, and its _____________ changes, what happens when it is cooled down? Can it work again?

12. ENZYMES Enzymes do not ever get used up. Enzymes do not die, but they can denature – the _________ is PERMENANTLY changed and they become unusable, ruined, and no longer work

13. What are the 2 things that chemical reactions can do? Hint they both start with a “B”

14. Types of Enzymes Anabolic Enzyme – helps to build a molecule Example of reaction helped by anabolic enzymes:

15. Enzymes Catabolic Enzyme – helps to break something down Example of reactions helped by catabolic enzymes:

16. Enzyme Lab Check & complete Lab questions with group Work on Enzymes study guide

17. Species of the day 10/30 Common Vampire Bat -Desmodus rotundus

18. Species of the day 10/30 Common Vampire Bat -Desmodus rotundus Common Vampire Bat Range

19. Species of the day 10/30 Common Vampire Bat -Desmodus rotundus The enzymes in this bat help it stay alive by lowering the ____________ __________ of its metabolic reactions (the chemical reactions that keep it alive).