Warm Up (9/30)
 What is turgor pressure? What do
plants use it for?
AP Biology
Page # Unit
41-42
2
43-44
2
45-46
2
47-48
2
49-50
2
51-52
2
53-54
2
55-56
2
57-58
2
59-60
2
61-62
2
63-64
2
65-66
2
AP Biology
Description
Microscope Lab
Science Daily Article – Endosymbiosis Insight
Article Analysis
Gut Bacteria Article
Cyanide Murders Case Study
Answers to Case Study
Notes: Cellular Respiration
Respiration: Glycolysis & Krebs Cycle
Practice Essay Question – 2011 Q1
Respiration: e- transport chain (ETC)
Information: Formal Lab 2 (Diffusion & Osmosis)
Practice: Water Potential
Practice: Cellular Respiration
Notebook Check Tomorrow
Water Potential
 Ψ = Water Potential
 Ψ of pure water = 0
 Ψ = Pressure Potential
p
Open container = 0
 Plant cell = + number

 Ψ = Solute Potential
 Water moves from
s
high to low water
potential
AP Biology
 Ψ of cell = Ψ of pure water = 0

AP Biology
Dynamic Equilibrium – net water
movement stops
Calculating Ψs
 Ψ = -iCRT
s

i = ionization constant
 NaCl = 2
 Sucrose = 1
C = Molar
concentration or
molarity
 R = 0.0831Lbars/moleK
 T = Temp in Kelvins

AP Biology
Water will move until water potential
inside and outside the cell is equal.
AP Biology
Molarity of
Sucrose in
Beaker
0.0 M
0.2
0.4
0.6
0.8
1.0
AP Biology
Percent
Change in
Mass
18.0
5.0
-8.0
-16.0
-23.5
-24.0
Respiration Lab
 Monday
Osmosis and Diffusion Lab:
Formal Lab 2
 Design, Conduct, Write on your own
 We will go over water potential
Thursday
 You will perform the laboratory next
week (Wednesday?)

AP Biology
Anaerobic Respiration & Fermentation
 Anaerobic Respiration – done by certain
bacteria adapted to oxygen lacking
environments.
Still utilizes ETC but has a different final
electron acceptor
 Example: Some “sulfate-reducing”
marine bacteria use the sulfate ion (SO -2)

4
AP Biology
Fermentation
 Glycolysis plus reactions that
regenerate NAD+ by transferring
electrons from NADH to pyruvate or a
derivative of pyruvate.

AP Biology
Nets 2 ATP
AP Biology
AP Biology
Respiration Lab
 Monday
Osmosis and Diffusion Lab:
Formal Lab 2
 Design, Conduct, Write on your own
 We will go over water potential
Thursday
 You will perform the laboratory next
week (Wednesday?)

AP Biology