Exam 3 Spring 2009

Exam 3 Spring 2009 - AVERAGE = 76.3% Principles of Cell...

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AVERAGE = 76.3% Principles of Cell Biology Exam 3 April 21, 2009 Directions : There are 75 questions in this exam with only one correct answer for each question. All answers are to be placed on the grid sheet. Good luck and may the Spirit of Spring be with you in your efforts! 1. The sodium/potassium ATPase plays a critical role in the energy production cycle in cells. What is the function and characteristics of this enzyme? a. It pumps sodium from the inside of the cell to the outside of the cell b. It pumps potassium from the outside of the cell to the inside of the cell c. It uses ATP to function d. It indirectly drives glucose transport from outside of the cell to the inside of the cell e. All of the above 2. Which of the following is not contained in a basal lamina (basement membrane)? a. Laminin b. Type IV collagen c. Entactin d. Perlecan e. None of the above because they are all constituents of the the basal lamina 3. Which of the following would be considered a “linker” molecule? a. Haluronic acid b. Collagen c. Laminin d. Fibronectin e. Both c and d 4. What did the experiment with Chlamydomonas show about the role of HSP70 in photoinhibition? a. HSP70 blocks photoinhibition b. HSP70 is the plant second messenger that triggers photoinhibition in other parts of the plant c. HSP70 phosphorylates Photosystem I d. HSP70 helps the plant recover from photoinhibition e. HSP70 blocks the carbon fixation cycle 5. When one refers to the α and β chains, which of the following below fits this description? a. Integrin receptors b. Type 1 collagen c. Type IV collagen d. Syndecan e. Glycosaminoglycans
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6. Which of the following molecules is calcium dependent (e.g. requires calcium for function)? a. N-CAM b. Fibronectin c. Laminin d. Hyaluronic acid e. E-cadherin 7. Which of the following statements about RUBISCO is false? a. It is a rather sluggish enzyme b. It is an integral enzyme in the Krebs cycle c. It is the key enzyme that incorporates carbon dioxide into carbohydrates. d. It has a lower affinity for carbon dioxide than does phosphoenolpyruvate (PEP) carboxylase e. None of the above are false because all are true 8. Which of the following does not contain a F O F 1 particle? a. Virus b. Bacterium c. Mitochondria d. Chloroplasts e. None of the above because they all contain this molecular complex 9. Photorespiration a. Involves acetyl CoA b. Is regulated by hydrogen peroxide c. Is favored by high levels of oxygen d. Is favored with high levels of carbon dioxide e. Occurs exclusively in the roots 10. The terms “cis” and “trans” are often used when discussing a. Heterophagy b. Autophagy c. How E-cadherin can bind to itself d. Laminin function e. The ability of hyaluronic acid to generate a hydration shell 11. In the mitochondria-mediated death cascade which of the following is the first among those listed below in this enzymatic series of reactions? a.
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Exam 3 Spring 2009 - AVERAGE = 76.3% Principles of Cell...

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