1. ENZYMES 2-4

2. Chemical reactions need help to get started.
Ex: A fire needs a match to get it started.

3. IT’S LIKE PUSHING A SNOWBALL UP A HILL
Once it gets to top . . .
it can roll back all by itself

4. Image from: http://www. hillstrath. on
Molecules in living things that help chemical reactions happen are called
= _________
Most enzymes are
_____________
SEE ANIMATION of AMYLASE
More about this in Chapters 7,8,9 and 12

5. Click the image to play the video segment.
Enzymatic Reactions 2D
Click the image to play the video segment.
Video 4

6. HOW ENZYMES WORK _______ __________ ____________ __________________
COMPLEX
__________
Unchanged
& Reusable
__________
Image modified from:
Arrow:

7. Click HERE to learn more about enzymes
ENZYMES _____ like
a _______________
to only _________of _________.
Enzymes are ___________ by the reaction and ___________

8. FACTORS THAT AFFECT ENZYME ACTIVITY
__________ & ______________
Conditions that are TOO ACIDIC
or TOO HOT cause proteins to
________ or _________
See a movie
Choose narrated

9. Denaturing _______ the _______ of the ______________ so enzyme ______________ to ____________
_______________ (keeping pH and temperature constant) is ______________ for maintaining ____________________
Image modified from:

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