-1-BIOS 100, Cells and Organisms Name:Exam II, 13 October, 2010Michael Muller, InstructorThis exam consists of 55 very simple questions lovingly spread over the following ten pages. Each question is worth 3 points apiece For your enjoyment, a codon chart is provided on the lastpage. Stop right now and make sure that you have bubbled in your last name first. You will losefive points from your exam total if you don’t do this. I’m not kidding. Really.Use the key below to answer questions 1 - 3I. Simple diffusion II. Osmosis III. Ion ChannelsIV. Facilitated diffusion V. Active transport1. Which of the above processes involve carrier proteins?A. I, II B. V only C. IV, V D. III, IV, V E. III, IV2. Which of the above can transport molecules down their concentration gradient?A. V only B. I, II C. I, II, III D. I, II, III, IV E. I, II, III, IV, V 3. Which of the above can transport molecules against their concentration gradient?A. V only B. I, II C. IV, V D. III, IV, V E. III, IV4. You put an animal cell into a drop of a solution on a microscope slide and the cell shrinks. You then dissolve some NaCl crystals into the same solution. What will happen to thecell?A. It will expand B. It will shrink more C. It will neither expand nor shrink 5. An animal cell has a 0.5 M internal concentration of osmotically active solutes. It is placed ina solution which has a 0.3 M concentration of osmotically active solutes. What willhappen to the cell?A. It will expand and possibly burst B. It will shrinkC. It will remain the same size6. The cell in the above example is said to be initially __________ to the external solution.A. Hypertonic B. Hypotonic C. Isotonic7. Two cells have an intial internal glucose concentration of 0.0 M. Both cells have 0.5 Minternal concentrations of osmotically active solutes. Cell X has glucose facilitatedtransport proteins on the plasma membrane while Cell Y does not. You place both cellsin separate 0.5 M solutions of glucose, what will happen to the two cells?A. Both Cell X and Cell Y will remain the same sizeB. Cell X will shrink while Cell Y remains the same size.C. Cell X will expand while Cell Y will remain the same sizeD. Cell X will remain the same size while Cell Y expandsE. Cell X will remain the same size while Cell Y shrinks-2-8. What allows plant leaves defy gravity and stick out?A. Turgor pressure B. An internal “skeleton” of celluloseC. The bark supports the leaves D. Fibers and scleridsE. None of the above9. Which of the following statements (A-D) about the Na /K pump is FALSE. If statementsA-D++are true, then choose E.A. The Na /K pump requires the hydrolysis of ATP to operate++B. The Na /K pump has two configurations, one which can bind to Na+ and the other++which can bind to K+C. The Na /K pump transports three Na+ out of the cell and two K+ into the cell++D. The Na /K pump pump is an example of a symport++E. All of the above statements about the Na /K pump pump are TRUE++10. Your roommate told you that the facilitated diffusion carrier protein in the H /Sucrose+transport system can carry sucrose against its concentration gradient. Is this true?A. No, it is not. A facilitated diffusion carrier protein must always transport allmolecules down their concentration gradientsB. Yes, it is true. However, the facilitated diffusion carrier protein must utilize ATPenergy to do so.C. Yes, it is true. It is a symport, so sucrose can be carried against its gradient into thecell if the total gradient of the H and sucrose is greater outside the cell than+inside. D. None of the above are adequate explanations for your roommate’s claims. As a rule ofthumb, you should ignore your roommate...The dreaded “what makes what” section. Use the key below to answer questions 11 through 16.I. Glycolysis V. Alcohol FermentationII. Oxidation of Pyruvate VI. Lactic Acid FermentationIII. Krebs Cycle VII. Non-cyclic PhotophosphorylationIV. Oxidative Phosphorylation VIII. Cyclic PhotophosphorylationIX. Calvin-Benson Cycle11. Which of the above processes have a net production of CO2?A. II, III B. II, III, IV C. II, III, V D. II, III, VI E . II, III, V, VI12. Which of the above processes produce O2?A. IV only B. VII only C. VIII only D. VII, VIII E. IV, VII, VIII13. How may of the above systems generate an H gradient?+A. One B. Two C. Three D. Four E. Five14. Which of the above systems convert NADPH to NADP?A. IX only B. V, VI C. IV, V D. IV, V, VI E. III, IV,V, VI15. How many of the above processes have a net production of ATP?A. Four B. Five C. Six D. Seven E. Eight16. How many of the above processes have a net production of either NADH or NADPH?A. Four B. Five C. Six D. Seven E. Eight-3-17. Which of the following statements (A-D) about photorespiration is FALSE? If statementsA-D are true, then choose E.A. Photorespiration is bad for the plant (I will be very upset if you choose this one...)B. The phosphoglycolate produced by photorespiration has many uses in the plantC. Photorespiration is more commonly seen in C3 plants than C4 plantsD. Repairing the damage caused by photorespiration can cost the plant up to 40% of itstotal net photosynthetic gainE. All of the above statements are TRUE 18. Which of the following does NOT happen in cyclic photophosphorylation?A. ATP is produced from the H pumping which occurs in cyclic photophosporylation+ B. Photosystem I reaction center is activeC. Electron transport occurs in the thylakoid membraneD. Light energy is utilizedE. NADPH is formed 19. The specific energy source for the reaction ADP + phosphate –> ATP by the enzyme ATPsynthase in thylakoid membranes is:A. Movement of electrons between photosystem II and photosystem I.B. Oxidation of waterC. Oxidation of NADPHD. Absorption of photons by chloroplast pigmentsE. The electrochemical gradient of H generated by the electron transport chain+ 20. On a warm sunny day, where is the pH of a plant cell the lowest?A. The nucleus B. The cytoplasmC. The stroma D. The thylakoid spaceE. The matrix21. Calvin and colleagues (of Calvin Cycle fame) determined the pathway of carbohydratesynthesis in plants by studying the incorporation of radioactive carbon dioxide intobiological compounds. Suppose that photosynthesis is proceeding at a steady pace in atypical experiment with the lights on, and carbon dioxide is being combined withribulose-bisphosphate (RuBP) to produce