Saturday, September 19, 2009

Coastal Clean Up Day at Bolsa Chica

Thanks to all who came out today to water and weed out non-native plants. There were so many people we were done in record time!

Thursday, September 3, 2009

Review for 1st Exam Bio 120

Hi Folks,
These questions appear elsewhere on the blog, but I have brought them up in a current post so they are easy to find.

1. A cell must maintain an imbalance of sodium ions on either side of the membrane for it to function. What process would it most likely use of the ones we discussed in class?
2. How are polar and non polar covalent bonds different?
3. What is a hydrogen bond, and why are these bonds important to life?
4. Oxygen has 8 electrons, with 6 in the outermost energy leve. Will this atom react?
5. How are ions formed?
6. A solution with a pH of 5 is how many times more acidic than a solution with a pH of 7?
7. What determines if an atom with react with another?
8. A plant cell in a hypertonic solution will under go _____________
9. An animal cell in a hypotonic solution may undergo _____________
10. A Paramecium can survive in fresh water without bursting. Why?
11. How are the mitochondria and chloroplasts similar?
12. Why do we think the mitochondria was once an independent organism?
13. Describe the plasma membrane. Include how a lipid membrane functions in a watery environment.
14. What role do the proteins in the plasma membrane play?
15. How is active transport different from diffusion and osmosis, and faciliated diffusion?
16. How is dialysis different from osmosis?
17. What affect would a hypertonic solution have on a cell?
18.How is a hypothesis different from a theory?
19.What are five characteristics of living things?
20.How are prokaryotic cells different from eukaryotics cells?
21.What can cyanobacteria do that the bacteria living in your mouth do not do?
22.How are archebacteria different from the bacteria living on your skin?
23.Describe briefly what organelles would be involved in making a protein and exporting it from the cell.
24.Give an example of two cell organelles working together to accomplish a task.
25.What organelle is found on the ER?
26.What is the function of lysosomes?
27.Where is the nucleolus, and what is its function?
28.What are the functions of the Golgi bodies?

Chapter 3
1. What are the building blocks of carbohydrates?
2. What is the difference between a saturated and unsaturated fatty acid?
3. Why is the shape of an enzyme important to the function of the enzyme?
4. At what level of complexity do proteins usually become functional?
5. What makes up a nucleotide?
6. What bond forms between amino acids as they react to form proteins?
7. How is the function of carbohydrates different in plants and animals?
8. What is the name of the carbohydrate human cells use to store glucose?
9. Which of the macromolecules we discussed stores energy in the most efficient way?
10. What is the most common steroid in the body?