1. BIOLogy 212 si! SUNDAY – 5:10-7 PM GILMAN 1002
TUESDAY – 7:10 GILMAN 2104 – MIX UP OF Q&A AND NEW MATERIAL FROM MONDAY
THURSDAY – 4:10 GILMAN 2104 – LAST MINUTE Q&A AND NEW MATERIAL FROM WED
exam review announcement - definitional and practice exam. bring questions

2. Any questions so far?

3. Biology feud! Each team member should take a turn being up
The first person to bang the desk and answers it right gets the win
Each team has 3 “call a friend” during the entire game where they can discuss the answer with their team to answer.

4. Facilitated diffusion transport
A.  requires membrane channel or carrier protein.
B.  requires ATP hydrolysis.
C.  requires H+ cotransport.
D.  requires membrane potential.
E.  requires osmosis.
Correct answer A

5. The lipid bilayer is held together primarily by:
A. The repulsion of phospholipid tails and water
B. Linkage of phospholipids together by ester bonds
C. High concentration of transmembrane proteins and cholesterol
D. Hydrogen bonds and Van deer Waals forces
Correct answer A

6. Competitive Inhibitors such as Statins do what to the Km value?
A. Raise the Km value which is raising the binding affinity
B. Raise the Km value which is lowering the binding affinity
C. Lowers the Km value which is raising the binding affinity
D. Lowers the Km value which is lowering the binding affinity B

7. If you were to put phospholipids into a cup of vegetable oil, which picture shows what could be expected?
Correct answer C

8. Unsaturated Fatty Acids have only single bonds (True / False?)
False: Double bond because not saturated with hydrogens

9. If a substrate binds to another site on the enzyme to deactivate it, what is that site called?
A. Active site
B. Allosteric site
C. Inhibition site
D. Death site B

10. A. Nothing. The phospholipid membrane stops the solutes from moving.
If a solution is hypotonic to the cell, which of the following will happen
A. Nothing. The phospholipid membrane stops the solutes from moving.
B. The water moves into the cell because it has a greater number of solutes.
C. The water moves out of the cell because it has a lesser number of solutes.
The ions in the cell move out because they want to follow the chemical gradient.
Correct answer B

11. List four factors that influence permeability.
Temperature, Cholesterol, sat/unsat, protein content

12. If you are not given a graph but you are given the Km values, how can you determine if it is a competitive inhibitor or a noncompetitive inhibitor?
A. You can’t, you need to see the graph
B. If the Km value increases this means it is a competitive inhibitor
C. If the Km value increases this means it is a noncompetitive inhibitor
D. If the Km value decreases this means it is a competitive inhibitor
E. If the Km value decreases this means it is a noncompetitive inhibitor
B and Km doesn’t change with noncompetitive

13. What part of the phospholipid bilayer have hydrophobic properties?
A. Nonpolar tails
B. Nonpolar heads
C. Polar tails
D. Polar heads A

14. A. Nothing. The phospholipid membrane stops the solutes from moving.
If a solution is hypotonic to the cell, which of the following will happen
A. Nothing. The phospholipid membrane stops the solutes from moving.
B. The water moves into the cell because it has a greater number of solutes.
C. The water moves out of the cell because it has a lesser number of solutes.
D. The ions in the cell move out because they want to follow the chemical gradient. B

15. True or False: Water moves from regions of low solute concentration to high solute concentrations, while solutes move from areas of high concentrate to areas of low concentration.
True

16. What will happen when the solution is at equilibrium if the purple circles are big polar ions and the pink circles are small nonpolar molecules:

17. Put the following in order of high permeability and low permeability
A. Large, polar molecules      
B. Small, polar molecules      
C. Ions       
D. Small, nonpolar molecules
D B A C

18. A function of mitochondria in plant cells is: A
A function of mitochondria in plant cells is: A. To catabolize organic molecules converting that energy into ATP B. To capture photons and convert that energy into organic molecules C. Help traffic proteins to the plasma membrane D. Nothing, plants don’t have mitochondria A

19. A function of the Rough ER in eukaryotic cells is: A
A function of the Rough ER in eukaryotic cells is: A. To replicate DNA B. Splice the precursor RNA into mRNA C. Translate proteins that are targeted for the endomembrane system D. Convert ATP into heat energy C

20. The largest cytoskeletal elements are long, hollow, cylindrical, and dynamically insatiable structures in the cell. They are: A. myosin B. microtubules C. intermediate filaments D. Actin filaments B

21. Plant cells and animal cells contain different structures
Plant cells and animal cells contain different structures. Common to both plant and animal cells are: A. Vacuole B. Cell wall C. Mitochondria D. Chloroplast C

22. In animal cells, hydrolytic enzymes are packaged to prevent general destruction of cellular components. Which of the following organelles functions primarily as a container for hydrolytic enzymes? A. Chloroplast B. Lysosome C. Central vacuole D. Peroxisome B

23. What are common components of the fluid-mosaic model. A
What are common components of the fluid-mosaic model? A. Lipids, proteins, carbohydrates B. Sodium, lipids, and nonpolar molecules C. Carbon, proteins, keratin D. Potassium, sugars, carbs A

24. I will announce exam room times/dates on Friday in class!
Any last minute questions?
Any study review questions?
Any questions?