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-1-BIOS 100 - Summer, 2009 Name:Exam II, 17 July, 2009Michael Muller, Instructor TA:This exam consists of 40 questions spreading like the plague over six pages. There is a codonchart provided for your viewing pleasure on the last page. If you don’t know what this is usedfor, you’re in big trouble. Good luck!The dreaded “what makes what” section. Use the key below to answer questions 1 through 6.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 Cycle1. How many of the above processes have a net production of ATP?A. Three B. Four C. Five D. Six E. Seven2. How many of the above processes have a net production of either NADH or NADPH?A. Three B. Four C. Five D. Six E. Seven23. Which of the above processes have a net production of CO ?A. II, III B. II, III, IV C. II, III, VI D. II, III, V, VI E . None of the above4. Which of the above processes utilize an H gradient?+A. VII, VIII B. II, IV C. IV, VII, VIII D. II, IV, VII, VIII25. Which of the above processes produce O ?A. IV only B. VII only C. VIII only D. VII, VIII E. IV, VII, VIII6. Which of the above systems convert NADH to NAD ?+A. IV only B. III, IV C. IV, V D. IV, V, VI E. III, IV,V, VI7. A small acorn over time can grow into a huge oak tree. The wood in such a tree can weighmany tons, even after it has been cut into logs and dried. Where does most of thisbiomass (dry mass) come from as the tree grows?A. Minerals in the soil B. Organic matter in the soil C. The air D. SunlightE. None of the above8. Guthion is a chemical that binds to Complex IV of the mitochondrial electron transportsystem. This prevents Complex IV from donating its electron to oxygen. What wouldhappen if a fly were exposed to a large amount of guthion?A. It would live with little to no effectsB. It would live, but with difficultyC. It would die shortly after exposureD. Most would die, but some would survive if they were transformedE. Who cares, it is only a fly-2-9. Which of the following statements (A-D) about ATP production in plants is FALSE? Ifstatements A-D are TRUE, then choose E.A. Plant cells can generate ATP in their cytoplasm, the chloroplast, and the mitochondriaB. On a warm, humid summer day, most of the ATP production of a cell would occur inthe chloroplastC. Later on at midnight, most of the ATP production in the same cell would occur in themitochondriaD. ATP synthesis in both the mitochondria and the chloroplast utilizes a membrane-bound proton pump to generate potential energyE. All of the above statements about ATP production in plants are TRUE.1 0211. Complex II is an enzyme that oxidizes FADH in the mitochondria. What would happen ifComplex II were destroyed in the electron transport system of a yeast cell and a humancell?A. Nothing, both cells could utilize NADH to supply the system with electrons, H+would be pumped, and ATP could be synthesizedB. The cell could still produce most of its ATP from NADH, but there would be some2loss due to the loss of electrons rom FADHC. Eventually the Krebs cycle would shut down and the human cell would die. The yeast cell could survive by generating ATP from glycolysisD. Eventually the Krebs cycle would shut down in the yeast cell and the cell could onlygenerate ATP from NADH produced in glycolysis. There would be little effect onthe human cellE. Both cells would die12. Which of the following statements is FALSE about a chloroplast in which all of the PSII(p680) were destroyed but the PSI (p700) and the rest of the electron transport systemswere still fully functional? A. The chloroplast could still produce ATPB. The chloroplast could still produce NADPHC. The chloroplast could still perform cyclic photophophosphoryation but not non-cyclic photophosphorylationD. The chloroplast would still be able to generate an H gradient+ E. Oxygen would not be generated when light was present13. Which molecule is responsible for pumping the H across the thylakoid membranes in the+ light-dependent reactions of photosynthesis?A. PSII (p680) B. Phaeophytin C. PlastoquinoneD. Cytochrome complex E. Plastocyanin-3-14. 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. Photorespiration is more commonly seen in C3 plants than C4 plantsC. The phosphoglycolate produced by photorespiration has many uses in the plantD. Repairing the damage caused by photorespiration can cost the plant up to 40% of itstotal net photosynthetic gainE. All of the above statements are TRUE15. Why would a muscle cell sometimes perform lactic acid fermentation if it produces somuch less ATP and produces a poison (lactic acid)? A. Muscle cells can recycle the lactic acid and produce pyruvateB. Lactic acid fermentation regenerates NAD+C. Muscle cells must perform lactic acid fermentation to bulk up and improve efficiencyD. Lactic acid fermentation produces ATP which oxygen-starved muscles needE. Muscle cells are just weird and like to poison themselves16. During which of the below activities would there be a substantial amount of lactic acidfermentation in your muscles?A. Sleeping B. Sitting in class, listening intently to my lecturesC. Walking to class D. Intense exerciseE. All of the above17. During beta oxidation, how do molecules enter the Krebs cycle?A. As pyruvate B. As Acetyl CoA2C. As Beta CoA D. As COE. Molecules don’t enter the Krebs cycle during beta oxidation18. Which of the following comparisons between aerobic respiration and photosynthesis isFALSE?A. Both processes synthesize ATP through the generation of H gradients via electron+transport systemsB. Photosynthesis breaks a water molecule to produce oxygen gas and ultimately givethat electron to an electron carrier molecule (NADP) while respiration takes2electrons from electron carrier molecules (NADH and FADH ) and ultimatelydonates them to oxygen gas to produce waterC. Both photosynthesis and aerobic respiration are exergonicD. Both photosynthesis and aerobic respiration have a net production of ATPE. Oxidation and reduction of molecules are important in both precess19. NADPH is an electron carrier molecule which


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UIC BIOS 100 - Exam II

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