pg 1.jpeg - BIOS-352/CHEM-352 Introductory Biochemistry Semester Fall 2018 1 of 6 Examination#3 INSTRUCTIONS Please put your name on every page There

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Unformatted text preview: BIOS-352/CHEM-352 Introductory Biochemistry Semester: Fall 2018 1 of 6 Examination #3 INSTRUCTIONS Please put your name on every page There are 6 pages The maximum score for this test is 100 points Circle the correct answer(s) for the multiple-choice questions Use of calculators, smartphones, computers, and supplementary materials, such as textbooks or notes from lectures, during the examination is strictly prohibited You have 60 minutes (1 hour) to answer the questions TEST SCORES Page 1 of 8 points Page 2 of 10 points Page 3 of 20 points Page 4 Page 5 of 17 points of 21 points Page 6 of 24 points Total of 100 points Question 1. (3 pts) Which one of the following statements is TRUE? A. In an anabolic process, simple precursors are converted to more complex products. B. Entropy is available to do work at constant temperature and pressure. C. Metabolism is defined as the breakdown of complex molecules to release energy. D. In any chemical process, the free energy of the products must equal that of the reactants. E. Catabolic processes require an overall input of energy. Question 2. (3 pts.) All of the following contribute to the large, negative, free-energy change upon hydrolysis of "high-energy" compounds except: electrostatic repulsion in the reactant. low activation energy of forward reaction. mo stabilization of products by extra resonance forms. stabilization of products by ionization. stabilization of products by solvation. Question 3. (2 pts) People with lactose intolerance are unable to fully digest the lactose in milk. The usual cause is insufficient expression of the enzyme that cleaves the disaccharide in the intestines. Which enzyme is needed to cleave lactose so that the products of the reaction can enter glycolysis? Circle the correct choice. hexokinase aconitase aldolase isomerase (lactase) glycogen phosphorylas NAME Key Question 4. (2 pts) Which statement concerning redox reactions is FALSE? A.) Oxidation is the transfer of one or more electrons to an atom or molecule. B. Oxidation is the removal of one or more electrons from an atom or molecule. C. For every reduction reaction that occurs, an oxidation reaction must also occur. D. The reduced and oxidized versions of an electron donor form a conjugate redox pair. E. A molecule that donates an electron can also be called a reducing agent. Question 5. Consider the following reaction: At equilibrium, the concentrations are as indicated Fructose-6-phosphate <>glucose-6-phosphate 10mM 200mM Notes: Use these rounded numbers for your calculations: Gas constant = R = 8 J/molk Faraday constant = F = 96 J/Vmol In 5 = 2 In 3 = 1 In 0.2 = -2 In 200 = 5...
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  • Spring '11
  • Nicholas
  • Exam #3

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