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Instructions: Write each question on your own paper. You are to hand in both the worksheet and your answer
sheet before you leave class today. Do as many questions as you can correctly in the class period.
Biology - Section 7.1 Study Questions
1. What three things does the cell theory state?
2. What was Robert Hooke famous for discovering? How did he make his discovery?
3. What did Anton van Leeuwenhoek discover?
4. What is a compound microscope?
5. Why are light microscopes not the best method for viewing cells?
6. How do electron microscopes work?
7. What is a disadvantage of using transmission electron microscopes and scanning electron
microscopes?
8. What is an advantage of using a scanning tunneling electron microscope?
9. What is a plasma membrane?
10. What is the job of a plasma membrane?
11. How does the size of a eukaryotic cell compare to the size of a prokaryotic cell?
12. What is a eukaryotic cell?
13. What are organelles?
14. What is a nucleus in a cell?
15. What is a prokaryotic cell?
16. How is the make-up of a eukaryotic cell different from the make-up of a prokaryotic cell?
17. How would life on Earth have been different if eukaryotic cells had not been present?
Biology - Section 7.2 Study Questions
1. What does the plasma membrane do?
2. What is homeostasis?
3. Why is homeostasis important to a cell?
4. Describe the plasma membrane.
5. What type of cells have a plasma membrane?
6. How does the plasma membrane demonstrate selective permeability?
7. Be able to explain both parts of Figure 7.5 on page 187.
8. Describe what a phospholipid is and from what it is made.
9. What is a phospholipid bi-layer?
10. Draw and label phospholipids like in Figure 7.6 on page 188.
11. Why is the head of a phospholipid attracted to water?
12. How do the fatty acid tails of a phospholipid react to water?
13. Describe how the phospholipid bilayer is formed.
14. How does water affect the way the phospholipid bilayer is formed?
15. Explain how water solubility and the polarity of the bilayer controls materials that move into and out of the
cell.
16. What role do receptor proteins play in the plasma membrane?
17. How do proteins help control the shape of the cell?
18. What is the purpose of transport proteins?
19. What role does cholesterol play in the phospholipid bilayer?
20. What role do carbohydrates play on the plasma membrane?
21. Describe what is meant by the "fluid mosaic model" of the plasma membrane.
22. Draw and label the parts of the plasma membrane in Figure 7.7 on page 190.