1. ENZYMES
Unit 1
Biochemistry

2. What is an ENZYME?
An enzyme is a special type of protein called a catalyst
Catalyst: substance that speeds up a reaction because it lowers the activation energy
Activation energy: energy needed to get a reaction started
Cells use enzymes to speed up reactions

3. Enzyme-Substrate Complex
Enzymes are very specific and typically only catalyze (speed up) one specific reaction, bonding with what is called a SUBSTRATE

4. Lock and Key

6. A Chemical Reaction is the change from one set of chemicals to another set of chemicals.
It involves the breaking of
bonds and the formation of new
bonds.

7. Chemical Reactions can happen in a lab setting
Chemical Reactions are constantly taking place inside your body
Catalysts: speed up the rate of a reaction
Enzymes = Biological Catalysts

8. Activation Energy

10. HOW DO ENZYMES WORK? Enzyme & Substrate BOND
Bonding weakens substrate to allow better fit
Enzyme & Products leave active site
Enzyme & Substrate come together at Active Site

11. What are enzymes used for?
Digestion
photosynthesis
DNA replication

12. What regulates enzymes?
changes in pH
temperature
other proteins & chemicals

13. Pop Quiz