1. ENZYMES 2-4 http://www.biologie.uni-hamburg.de/b-online/library/cat-removed/enzyme_.gif

2. Chemical reactions need help to get started. Ex: A fire needs a match to get it started. http://www.chuckwagondiner.com/art/matches.jpg http://plato.acadiau.ca/COURSES/comm/g5/Fire_Animation.gif

3. _________________to get a chemical reaction _______________ = _____________________________ Image from: Pearson Education Inc, publishing as Pearson Prentice Hall. All rights reserved REACTANTS PRODUCTS ACTIVATION ENERGY Energy-____________ reactions often occur _____________ and end up at a lower energy level.

4. ___________ HELP CHEMICAL REACTIONS _______________ Catalysts work by ____________ the ___________________________to get a chemical reaction started. Image from: Pearson Education Inc, publishing as Pearson Prentice Hall. All rights reserved

5. CATALYSTS in Living Things In living systems, __________ act as ________________to control chemical reactions and lower activation energy. Image from: http://www.hillstrath.on.ca/moffatt/bio3a/digestive/enzanim.htm More about this in Chapters 7,8,9 and 12 SEE ANIMATION of AMYLASE

6. PROTEINS CAN BE ENZYMES _______________ (reactant) ____________________ _______________ ___________ ____________ ____________ & ___________ _________ Image modified from: http://www.biologie.uni-hamburg.de/b-online/library/cat-removed/enzyme_.gif Arrow: http://www.gifanimations.com/action/ImageDisplay/1/2/11/next (bonds are broken)

7. Click HERE to learn more about enzymesHERE ENZYMES _____ like a _______________ to only __________of _________. Enzymes are ____________ by the reaction and ______________. http://www.grand-illusions.com/images/articles/toyshop/trick_lock/mainimage.jpg

8. FACTORS THAT AFFECT ENZYME ACTIVITY ___________ & ______________ Conditions that are TOO ACIDIC or TOO HOT cause proteins to __________ or __________ http://www.desktopfotos.de/Downloads/melt_cd.jpghttp://www.nealbrownstudio.com/adm/photo/163_nb_fried_egg.jpg See a movie

9. Denaturing _________the_________of the _____________________ so enzyme __________________ to ______________ Image modified from: http://www.lewport.wnyric.org/jwanamaker/animations/Enzyme%20activity.html ___________________ (keeping pH and temperature constant) is _______________ for maintaining ______________________

10. Many enzyme NAMES end in ______ and the beginning of the name tells what it does… DNA Polymerase= “polymerizes” joins monomers to make DNA Protease= breaks down proteins ATP synthase= synthesizes ATP

11. OtherThings that can increase the rate of a reaction Add ______ _______

12. Increase the _____________ ___________the available surface area by using __________ pieces