Transcript enzyme

Announcements
• Turn in Homework
– SA 2-3
– Chart of organic compounds
Review
• What is the function of a lipid?
• T/F Carbon can stably bind with other
carbons?
• What is the monomer of a protein?
• BONUS
– What is dehydration synthesis? What is
hydrolysis?
Basic Enzyme Information
• What are enzymes?
– Enzymes are proteins. Proteins are made
from amino acids. Different combination of
amino acids will create different structures of
protein. The structure determines function of
protein (enzyme)
• Purpose
– Acts as a catalyst for a reaction to take place.
It simply lowers the needed energy for a
reaction to take place. Enzymes are not used
up in during a chemical reaction
Paper towel demo
• What makes up a paper towel?
• Reaction equation
– Cellulose + Oxygen  Carbon Dioxide + Water
• So let’s try to make the reaction happen
Effect of Enzymes
Section 2-4
Reaction pathway
without enzyme
Activation energy
without enzyme
Reactants
Reaction pathway
with enzyme
Activation
energy
with enzyme
Products
Go to
Section:
Figure 2-19 Chemical Reactions
Section 2-4
Energy-Absorbing Reaction
Energy-Releasing Reaction
Activation
energy
Products
Activation energy
Reactants
Reactants
Products
Go to
Section:
Figure 2-19 Chemical Reactions
Section 2-4
Energy-Absorbing Reaction
Energy-Releasing Reaction
Activation
energy
Products
Activation energy
Reactants
Reactants
Products
Go to
Section:
Enzyme Lab
•
•
We are going to test the effects of
temperature on enzyme activity.
Liver contains the enzyme catalase
which breaks up H2O2 into H2O and O2
– H2O2  H2O and O2
Proper lab write-up
•
•
•
•
•
Introduction (paraphrase)
Hypothesis (which temp is best)
Materials (what did you use)
Procedure (what did you do)
Data and Observations (charts and
averages)
• Questions (3 in the lab)
• Conclusion (use data to state the best)
Lab Write Up Hints
• Neatness counts
– If you can type it, you will receive more points
• Procedure
– Write the procedure as though you will give it
to someone who never took biology
• Graphs/charts
– Use graphs (labeled) and data tables
Homework
• SA 2-4 page 53 #1-5
• Start looking at the back of the sheet to
review for the test next week
– Day 2
• Have a good day