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BIL255 Exam I Fall 1998

BIL255 Exam I Fall 1998 - PreMed411.com ANSWERS TO FALL 98...

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ANSWERS TO FALL 98 TEST 1 BIL 255 Dr. Herbert : ANS 1: 8 12 20 26 32 37 38 40 <--question #’s ANS 2: 3 13 15 18 22 23 27 36 ANS 3: 4 16 17 19 24 29 30 31 ANS 4: 6 11 21 25 28 34 35 39 ANS 5: 1 2 5 7 9 10 14 33 ANSWERS TO FALL 96 TEST 1 BIL 255: ANS 1: 2 3 13 15 16 26 30 39 ANS 2: 1 7 9 14 19 22 24 25 28 29 34 40 ANS 3: 4 5 6 8 12 18 21 32 35 38 ANS 4: 10 11 23 27 31 33 36 ANS 5: 17 20 37 ANSWERS TO SUM 96 TEST 1 BIL 255: ANS 1: 1 3 21 25 28 34 36 38 41 42 ANS 2: 2 5 9 24 35 39 43 46 50 ANS 3: 6 10 11 17 18 20 22 33 37 44 45 49 ANS 4: 7 8 14 15 23 26 31 32 40 48 ANS 5: 4 12 13 19 27 29 30 47 ANSWERS TO FALL 94 TEST 1 BIL 255: ANS 1: 3 7 10 11 19 26 30 38 42 46 49 ANS 2: 4 6 12 15 18 20 28 31 34 41 ANS 3: 9 14 16 21 25 33 36 39 45 48 ANS 4: 1 4 22 24 27 29 32 37 43 47 50 ANS 5: 5 8 13 17 23 23 35 40 44
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Bil 255, Cell Biology - Fall Semester - First Examination - October 6, 1998 Form 1 1) What is GRP78? carbohydrate 1. a non-protein group which binds iron in hemoglobin or myoglobin. 2. a non-competitive inhibitor for one of the enzymes in glycolysis. 3. hydrophobic non-protein materials used to denature proteins in the laboratory. 4. none of the above answers are correct. 5. 2) A colleague tells you that a particular enzyme catalyzed reaction obeys Michaelis-Menten kinetics and that at a substrate concentration of 3mM, the reaction velocity is one-third of maximum. What is the Michaelis constant, K M ? 1mM 1. 2mM 2. 3mM 3. 4mM 4. none of the above answers are correct. 5. 3) A colleague tells you that a particular enzyme catalyzed reaction obeys Michaelis-Menten kinetics and that at a substrate concentration of 3mM, the reaction velocity is one-third of maximum. At what concentration is the reaction velocity one-quarter of maximum? 1mM 1. 2mM 2. 3mM 3. 4mM 4. none of the above answers are correct. 5. 4) A colleague tells you that a particular enzyme catalyzed reaction obeys Michaelis-Menten kinetics. You run this reaction with just enzyme and substrate and then repeat your experiment with some mystery substance added. When you add the mystery substance, you find that the maximum velocity of the reaction remains the same. But, the effective K M is smaller when the mystery substance is added as compared to the K M measured without mystery substance. Which of the following best describes the mystery substance? competitive inhibitor 1. noncompetitive inhibitor 2. activator 3. the mystery substance is just more of the substrate. 4. http://fig.cox.miami.edu/cgi-bin/tiegen?/usr/ns-home/docs/Faculty/Tom/Exams/255f98e1f1.tie (1 of 8) [8/29/2000 1:11:49 AM]
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5) Let's suppose that life first appeared around volcanic "vents" deep under the ocean's surface. Which of the following best characterizes or identifies the first cells to appear around these "vents"? heterotrophic eukaryotes 1. heterotrophic prokaryotes 2. chemoautotrophic eukaryotes 3. photoautotrophic prokaryotes 4. chemoautotrophic prokaryotes 5. 6) There is one type of amino or imino acid in which the residual side chain forms a covalent bond back to the amino or imino nitrogen on the alpha carbon. What is an example of this amino or imino acid?
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