1. Warm-Up (9/8) A. B. Name Date Period
On the piece of white paper from the back, answer the following question.
Name
Date
Period
An exergonic reaction is one in which products require less free energy to form than the reactants, and energy is thus released. An endergonic reaction is the opposite: energy is absorbed because the products required more energy to form than the reactants. Based on the free energy diagrams below, draw a curve representing the reaction catalyzed by an enzyme, and label each diagram as either exergonic or endergonic. A. B.

2. Class Web Site Go to: https://edgewoodisd.edmodo.com Select “STUDENTS”
Make an account with a username and password and type in group code: q2fvuc
Go to the “AP Biology” group and see what I’ve posted!

3. Biomolecules and Enzymes
Fleenor, tell the students about:
Caramelizing onions
Ripening Fruit
Enzymes in spit

4. Enzymes Cofactor/coenzyme – AKA allosteric activator
Coenzymes – big molecules (organic, has C)
Cofactors – small ions (inorganic, no C)
NAD
NaCl

5. Enzymes
What kind of biomolecule does this look like?
NAD
NaCl

6. Question!
Describe how salt affects an enzyme’s function. Be sure to include where the NaCl ions bind!
NaCl

7. Water
Turn to p. 51
δ+: “partial” positive
δ–: “partial” negative

8. Water
Hydrogen bond – weak association between δ+ hydrogen and δ– oxygen
δ+: “partial” positive
δ–: “partial” negative

9. Why does “polar like polar?”
Question!
Why does “polar like polar?”

11. Transpiration
p. 775
Water “climbs” up the stem via cohesion and adhesion. How does that work?

12. It sucks to be a plant
transpiration – leaf opens up pores to get CO2 and H2O evaporates

13. Our Transpiration Experiment
What kind of biomolecule is wax made of?
What is the relationship between lipids and water?
Which plant do you predict will lose less water?
Why?

14. Closure (9/8) Homework! (9/8)
Describe a hydrogen bond, and explain how hydrogen bonding aids in the transport of water up a plant’s stem. What role does transpiration (water loss) play in this process?
Homework! (9/8)
Watch this video and take notes:
“YouTube Bozeman Plant Nutrition and Transport”