BIBC 102 2006 Final key

BIBC 102 2006 Final key - 1 The Final Exam BIBC 102...

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Unformatted text preview: 1 The Final Exam BIBC 102, Metabolic Biochemistry Tuesday, March 21, 2006 A) This exam has 19 pages (including this cover page); please check whether your exam is complete before you start to answer questions. B) The exam has 100 multiple-choice questions and each question is worth 1 point. C) The questions are NOT arranged according to the degree of difficulties. Instead, the order of the questions is arranged randomly. D) For each question, choose only one answer from the choices offered, and enter it onto the appropriate space of the scantron sheet. Use a number 2 pencil only. E) You can keep the exam booklet after the exam and compare your answers with the key, which should be on the website tonight. F) You have 3 hours total to answer the questions. Good luck! 2 1. Which of the following compound(s) can be used to synthesize glucose in animals through gluconeogenesis A. lactate B. succinate C. citrate D. A, B, and C E. none of the above 2. How much energy input is required for synthesis of a molecule of glucose from two molecules of phosphoenolpyruvate A. 1 ATP, 1 GTP B. 2 ATP, 2 GTP C. 2 ATP, 0 GTP D. 0 ATP, 2 GTP E. 4 ATP, 2 GTP 3. Which of the following enzyme is NOT used in gluconeogenesis. A. Pyruvate kinase B. Triose phosphate isomerase C. Phosphoglycerate kinase D. Phosphoglucose isomerase E. None of the above 4. Which of the following statement is true A. citrate inhibits PFK1 and activates fructose 1, 6-bisphosphatase B. citrate activates PFK1 and inhibits fructose 1, 6-bisphosphatase C. fructose-1,6-bisphosphate activates PFK1 and inhibits fructose 1, 6-bisphosphatase D. fructose-1,6-bisphosphate inhibits PFK1 and activates fructose 1, 6-bisphosphatase E. none of the above 5. Which of the following pair of enzyme-catalyzed reactions consists of a “futile cycle” A. PFK1 and fructose 1, 6-bisphosphatase B. Hexokinase and Phosphoglucose isomerase C. Pyruvate carboxylase and pyruvate kinase D. Isocitrate dehydrogenase and isocitrtae lyase E. None of the above 6. The Cori cycle A. is another name for the TCA cycle B. is also called alanine cycle C. is involved in metabolism of lactate D. is also called Calvin cycle E. is the non-oxidative phase of the pentose phosphate pathway 3 7. How many kinases are needed in the process of glucose synthesis from lactate? A. B. 1 C. 2 D. 3 E. 4 8. How many phosphatases are needed in the process of glucose synthesis from lactate? A. B. 1 C. 2 D. 3 E. 4 The questions 9-13 are based on the following graph. The graph describes experiments with purified mitochondria. The X-axis is time, the left Y-axis refers to oxygen consumption, and the right Y-axis refers to ATP synthesis. The curve with solid line represents oxygen consumption while the broken line refers to ATP synthesis....
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BIBC 102 2006 Final key - 1 The Final Exam BIBC 102...

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