midterm1 - BCH 3120 Intermediary Metabolism Midterm 1...

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Université d’Ottawa Faculté de science Biochimie University of Ottawa Faculty of Science Biochemistry www.uOttawa.ca BCH 3120 Intermediary Metabolism Midterm 1 Version ‘A’ Wednesday February 2, 2011 Exam duration: 1 hour Dr. M-E. Harper Dr. A. Aziz Your Name:________________________________ Student Number:____________________________ Hand in this booklet, and the pink Scantron computer sheet. Remember to record your name and student number on both of them.
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[Type text] Name: ______________________________ Student number: __________ 2 Multiple Choice Questions Each question is worth one mark. There are 30 questions in this section. Make sure that you write your answers on the Scantron (pink) sheet for marking. 1) The version of the midterm is: (a bonus mark to start!) [Mark your answer on the Scantron sheet!] a) version A b) version B 2) How much ATP is stored in the adult human body? (i.e., in kcal units) a) less than 100 kcal b) approximately1000 kcal c) 5,000-7,000 kcal d) approximately 30,000 kcal e) approximately 10,000 kcal a 3. Most of the dietary energy that most North American adults consume each day is from a) fat b) carbohydrate c) protein d) ethanol e) lactose b 4) Most of the energy content of the adult human body is in the form of: a) triglyceride b) glycogen (liver content and muscle content combined) c) protein d) glucose circulating in the blood e) free fatty acids circulating in the blood a 5) Which of the following statements regarding allosteric control of enzymes is UNTRUE? a) An allosteric inhibitor functions by competing with the enzymes substrate at the substrate binding pocket. b) In the “R” (relaxed) state the enzyme has high affinity for the substrate c) The inhibition of glycerol kinase by glucose is an example of allosteric inhibition. d) Allosteric inhibitors and activators induce conversion from the relaxed state to the tense state, and the tense state to the relaxed state, respectively. e) Allosteric control of enzymes is commonly observed in metabolic pathways. a 6) Which of the following is a common method through which enzyme degradation is initiated? a) protein acetylation b) protein ubiquitinization
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[Type text] Name: ______________________________ Student number: __________ 3 c) protein methylation d) protein phosphorylation b) 7) Glucose has several metabolic fates in muscle cells. Which of the following is not a product of glucose metabolism in muscle cells? a) pyruvate b) ribose5-phosphate c) glycogen d) sucrose e) acetyl-CoA (d) 8) Which of the following is not an intermediate in glycolysis a. 1,3-bisphosphoglycerate b. fructose 2,6-bisphosphate c. dihydroxyacetone phosphate d. phosphoenolpyruvate e. All of the above 9) Which of the following inhibits phosphofructokinase-1 activity a. ATP b. citrate c. low pH d. glucagon e. All of the above 10) What is the purpose of the pentose phosphate pathway a. generates NADH for biosynthetic pathways b. generates ribose-5-phosphate for the synthesis of DNA and RNA
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midterm1 - BCH 3120 Intermediary Metabolism Midterm 1...

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