Exam2-2009 - __________________________________

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Unformatted text preview: __________________________________ _____________________________________ Name (Last, First) SOLAR ID 1 BIO 361 EXAM 2 FALL 2009 Version 1 NAME:_________________________________________________ ID:_____________________________________________________ 1. Write Your name and ID on all pages 2. Write all answers in pen only 3. Make sure your exam has 10 pages including this cover page Page 3 _______________ Page 4 _______________ Page 5 _______________ Page 6 _______________ Page 7 _______________ Page 8 _______________ Page 9 _______________ Page 10 _______________ Total _______________ __________________________________ _____________________________________ Name (Last, First) SOLAR ID 2 1-4. You have been given an aliquot of a newly discovered enzyme E which catalyzes the conversion of stock shares S into gold bricks G. Use these plots to answer questions 1-4: __________________________________ _____________________________________ Name (Last, First) SOLAR ID 3 Questions 1-4 (2 points each) make use of the plots on page 2. 1. _____ Which plot correctly describes a pattern you would observe if you had been assured that the properties of the enzyme E are consistent with Michaelis-Menten kinetics and you had made sufficient measurements to confirm that the enzyme does indeed display Michaelis-Menten behavior? 2. _____ Which plot reflects a major feature of the Briggs-Haldane model of simple conversion of the stock shares to gold bricks in the presence of the enzyme? 3. _____ Which plot reflects the principle that this enzyme is a true catalyst? 4. _____ Which plot could you use to estimate the catalytic constant for the enzyme (assuming you knew its concentration) but not its apparent affinity for stock shares? (Questions 5 through 22 are 4 points each) 5. In the presence of 10 mining company bonds the rate of conversion of 1000 stocks to gold bricks is slowed markedly, but the rate of conversion of 100,000 stocks to gold bricks is slowed only slightly. The enzyme cannot convert mining company bonds to gold. You would conclude that: a. these observations are most consistent with formation of a covalent complex between the enzyme and mining company bonds. b. when the concentration of mining company bonds is equal to its Ki for this enzyme, the rate of conversion of stocks to gold is halved. c. the structures of stocks and mining company bonds are likely to be similar d. a family of Lineweaver Burk plots for stocks in the presence of different concentrations of mining company bonds should resemble a series of parallel lines. e. a family of Lineweaver Burk plots for stocks in the presence of different concentrations of mining company bonds should resemble a series of lines which intersect on the X-axis....
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Exam2-2009 - __________________________________

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