2. Aim: Why are Enzymes necessary for our survival? A + BC C

3. What role do enzymes play in our bodies? A + BC Enzymes speed up chemical reactions

4. Let’s Review Chemical Reactions: A + B C or C A + B Raw Materials Products

5. What Reaction is this? A + B AB + H 2 O Dehydration SynthesisEnzyme If an enzyme is added to the reaction, then it will speed up the reaction. In other words, we will produce AB more quickly.

6. What is a Catalyst? A catalyst is any substance that speeds up a chemical reaction without itself being changed. Why are enzymes called organic catalysts? They are PROTEINS!!

7. What are some important reactions that enzymes need to speed up? Digestion Synthesis PhotosynthesisCell Respiration

8. How do enzymes work? A + B AB ENZYME AB Enzymes bind to the substance(substrate) so the chemical reaction can take place.

9. What are Substrates and Active Sites? AB A + B AB Substrates-are the substances that bind to the enzyme Active Site- is the place on the enzyme where the substrates bind

10. Think of enzymes and substrates as a lock and key Substrate Enzyme Active Site Enzymes are specific!

11. Enzyme-Substrate Complex Is formed when the substrate is bound to the enzyme Enzyme Substrate

12. Enzyme-substrate specificity Enzymes are SPECIFIC (in shape) for the SUBSTRATES they attach to, just like a lock and key.

13. What do you think determines the shape of enzymes? Enzyme 1)The sequence (order) of amino acids in a protein determine its shape 2) The shape of a protein determines its function

14. WHAT CHANGES? A-B + H 2 O A + B Enzyme What reaction is this? Hydrolysis The enzyme doesn’t change, it can be reused!

15. Some common enzymes PROTEIN AMINO ACIDS protease Hydrolysis

16. Can you ID the substrate, product, enzyme, active site, & enzyme substrate complex? Substrate Product Enzyme Active Site Enzyme – Substrate Complex