-1-BIOS 100 - Summer 2007 Name:Exam IV, 20 July, 2007Michael Muller, Instructor TA:This exam consists of 54 questions over 6 pages. Please check to see that all the pages are present beforeyou begin. Use a #2 pencil and bubble in all answers. Your score will be posted on the UIC Blackboardsite as soon as they are in. No kidding. Good Luck! 1. What type of bond is responsible for holding the two strands of double stranded DNA together?A. Polar B. Covalent C. Ionic2. An alpha helix is what type of protein structure?A. Primary B. Secondary C. Tertiary D. Quaternary3. Which of the following statements about water is FALSE?A. Water is a polar moleculeB. Water has a high surface tensionC. Water has a low specific heat capacityD. Water has strong adhesive and cohesive propertiesE. Water can act as both an acid and a base4. What type of bond joins two amino acids in a protein?A. Protien bond B. Phosphodiester bond C. Peptide bondD. Glycosidic bonds E. Proteaceous bonds4225. When you burn methane (CH ) to form CO and H O, the carbon becomes:A. Oxidized B. Reduced C. Neither6. Which of the following statements about enzymes is FALSE?A. Enzymes speed up a chemical reaction by lowering the activation energy of the reaction.B. Enzymes catalyze both the forward and reverse reactionsC. Some enzymes may become consumed in the reactionD. Many enzymes are sensitive to external environmental conditions like temperature andpHE. Many enzymes are allosterically regulated227. Rubisco catalyzes the fixation of CO to RuBP. It also can fix an O to RuBP. What is the22relation of O to CO in this example?22 22A. O is a substrate to CO B. O is an agonist to CO 222 2C. O is an allosteric inhibitor to CO D. O is a competitive inhibitor to CO 8. Which of the below cellular structures is incorrectly matched with its function:A. Ribosome - site of protein synthesis B. Golgi apparatus - distribution of proteinsC. Nucleolis - synthesis of lysosomes D. Mitochondria - site of aerobic respirationE. Smooth ER - synthesis of lipids-2-9. Which of the below characteristic are important in the generation and maintenance of turgorpressure?A. Chloroplast B. Cell Wall C. Central vacuoleD. B & C E. A, B, & C10. Which of the following characteristics/processes is NOT found in all cells?A. Protein synthesis B. DNA synthesis C. Enzyme-catalyzed reactionsD. Glycolysis E. Aerobic respiration11. This molecule is the principle component of a plasma membrane.A. Triglyceride B. Phospholipid C. CholesterolD. Water E. Proteins w/ alpha helices12. Which of the following statements about biological membranes is FALSE?A. Lateral movement of phospholipids is much more common than a “flip flop” B. Increasing the saturation of the fatty acids of phospholipids will decrease membranefluidityC. Increasing the concentration of cholesterol in a membrane will decrease membranefluidityD. Biological membranes have a uniform distribution of proteins E. Integral proteins typically possess several alpha helices 13. Solutions A and B are separated by a plasma membrane. Solution A has a concentration of0.25 M glucose and solution B has a concentration of 0.5 sucrose. Which way will watermove?A. From A to B B. From B to A C. No net movement of water14. A cell has an internal solute concentration of 0.66M. It is placed in a solution of 1.00M NaCl. The external solution is ______ to the cell.A. Isotoic B. Hypertonic C. Hypotonic15. The Na /K pump is an example of:++A. A molecular channel B. A facilitated diffusion transport proteinC. An active transport symport D. An active transport antiport16. Why does the cell convert glucose taken in by the glucose facilitated diffusion transportprotein to glucose-6-phosphate?A. To make it easier for the glucose to enter into the Krebs cycleB. Glucose is unstable inside the cell, so it is converted to glucose-6-phosphate C. Glucose-6-phosphate is unable to leave the cell via the facilitated diffusion transportproteinD. Glucose-6-phosphate is more energized so it will remain in the cellE. None of the above17. Plant cells contain functional mitochondriaA. True B. False-3-18. Which of the below statements (A-D) about the various types of photosynthesis is FALSE? 32A. C plants utilize PEP carboxylase when they fix CO4B. C plants typically possess Kranz anatomy4C. C plants are typically found in hot, dry environments24D. CO is fixed twice in both C and CAM plantsE. CAM plants typically open their stomates at night19. From where does PSII (p680) replenish its lost electron?22 2A. H O B. O C. CO D. PSI (p680) E. NADPH20. Which of the below statements (A-D) about Rubisco and photorespiration is FALSE?22 A. Rubisco is a large and very slow enzyme with an active site that fits both CO and O 4B. Rubisco is concentrated in the bundle sheath cells of C plantsC. The products of photorespiration, glyceraldehyde and phosphoglycolate, are both usefulin photosynthesis34D. C plants experience much more photorespiration than do C plants21. Which color of light is maximally absorbed by chlorophylls a and b?A. Blue B. Green C. Yellow D. Red E. Infrared22. Which of the following molecules is NOT bound to the thylakoid membrane?A. PSII (P680) B. PSI (P700) C. Phaeophyton D. NADP23. Cyclic photophosphorylation produces ________. Noncyclic photophosphorylation produces_______.A. ATP only; ATP only B. ATP only; ATP and NADPHC. ATP and NADPH; ATP only D. ATP and NADPH; ATP and NADPH24. Which process below does not produce ATP?A. Glycolysis B. Oxidation of pyruvateC. Krebs cycle D. Oxidative phosphorylation25. What is the function of lactic acid fermentation in human muscle cells?A. To regenerate NAD+ from NADHB. To generate lactic acid to aid in respirationC. To lower the pH of the muscle cellsD. To generate ATPE. None of the above26. What is the relationship between ATP and phosphofructokinase?A. ATP is a substrate of phosphofructokinaseB. ATP is a competitive inhibitor of phosphofructokinaseC. ATP is an allosteric regulator of phosphofructokinaseD. A & BE. A & C-4-27. Which process below produces the most ATP?A. Glycolysis B. Oxidation of pyruvateC. Krebs cycle D. Oxidative phosphorylation28. DNA replication is:A. Liberal B. Conservative C. Semi-conservative D. Dispersive29. What is the function of ligase?A. Seal nicks and breaks in the DNA chain B. Remove
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