1.  Change one set of chemicals into another
set of chemicals.
 They do this by
reorganizing the
parts of each molecule.
 Always involves the breaking of bonds and
formation of new bonds in products

3. Reactants Products
Starting materials Finishing Materials
Left side of arrow Right side of arrow
The stuff you The stuff you
“react” “produce”
Reactants Products

4. Reactants Products

5.  Proteins that act as a catalyst in the body
(Catalyst: Speeds up a reaction)

6.  Very specific- only work on one type of
reaction
 Not used up-one enzyme does many
reactions

8.  Like a lock and key
 Substrate (the reactant) binds to the enzyme
at the active site- it provides a place for the
reaction to happen.

9. A=
B=
C=
D=

10.  Enzyme Video