Each of your cells is like a miniature chemical factory capable of performing thousands of
different reactions. As a cell's needs change, some of these reactions speed up, while others slow
down. In this section you'll read about a group of specialized proteins that coordinate the cell's
chemistry.
(Some *terms you will have to look up online)
Chemical Reactions
*Products:
*Reactants:
Enzymes and Activation Energy
1
Energy in Reactions
*Exergonic: ____________________
*Endergonic:____________________
http://bio.winona.msus.edu/berg/ILLUST/Choice2.jpg
A:
B:
C:
D:
Enzymes Speed up the Cell’s chemical Reactions by lowering energy barriers
Enzymes are proteins that ____________________________________________
_________________________________________________________________
2
Activation Energy:____________________________________________________
EA without an enzyme is ____________________than EA with an enzyme
Why are enzymes essential for the metabolism of a cell? ________________________
How Enzymes Work
Substate:
Active Site:
3
Describe what is occurring at each stage of the diagram
1.
2.
3.
4.
Answer:
1. Explain the role of activation energy in a reaction. How does an enzyme affect
activation energy?
2. Describe how and where a substrate interacts with an enzyme.
Ch. 5.1 Building and Breaking Polymers
Monomer:
Polymer:
Dehydration Synthesis:
Hydrolysis (digestion):
Concept Check 5.1
1. Explain the connection between
monomers and polymers.
2. What molecule is released during
construction of a polymer? What is
this reaction called?
4