Exam_3 - BIOLOGY 311C - Brand Spring 2007 NAME (printed...

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Spring 2007 Exam 3 p. 1 BIO 311C Brand BIOLOGY 311C - Brand Spring 2007 NAME (printed very legibly) ________ KEY _________________________ UT-EID ________________ EXAMINATION 3 Before beginning, check to be sure that this exam contains 7 pages (including front and back) numbered consecutively, and that you have been provided with a clean Answer Sheet. Then immediately print your name and UT-EID legibly at the top of this page. Also print and bubble in your name and your UT-EID (not your social security number) on the front of the answer sheet in the spaces provided. The first 41 questions are “multiple choice”, with only one correct answer. Mark the letter corresponding to the correct answer to each of these questions in the appropriate location on the Answer Sheet, using a No. 2 pencil. Write answers to Questions 41 – 45 directly on this exam, in the spaces provided with the questions. Write in complete sentences if an explanation or a description is required. Print neatly if your handwriting is likely to be difficult to read. Turn in both this exam and the Answer Sheet after checking to be sure that your name is clearly written in both places and all questions have been answered in the appropriate locations. You must turn in you exam on or before 9:50 a.m. 1. The sum of all chemical reactions of a living cell is called the cell’s: a. energy balance. b. homeostasis. c. signaling sequence. d. metabolism. 2. The chemical substance often referred to as the energy currency of cells is: a . ATP. b. DNA. c. NADH. d. cyclic AMP. 3. Consider an enzyme that consists of a single polypeptide chain. The enzyme becomes denatured when a solution of the enzyme is heated to 50ºC. This denaturation is likely caused by a change in the enzyme’s: a. primary structure. b. secondary structure. c. tertiary structure. d. quaternary structure. 4. The binding domain for a regulatory molecule of a regulatory enzyme is called a(an): a. allosteric site. b. active site. c. signal receptor. d. membrane receptor. 5. The half-reaction shown at right can be described as a(n): a. oxidation. b. reduction. c. de-protonation. d. hydrolysis.
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Spring 2007 Exam 3 p. 2 BIO 311C Brand Questions 6 - 8 relate to the reaction , with a K eq value of 0.01. Recall that free energy changes for chemical reactions under standard conditions can be expressed as: Δ Gº = (-5.7 kJ/mole) (log 10 K eq ). [The K eq was determined in that absence of any enzyme or other catalyst] 6. This chemical reaction may be described as: a. exergonic. b. spontaneous. c. endergonic. d. exothermic. 7. The Δ Gº value of this chemical reaction is: a. +11.4 kJ/mole. b. -5.7 kJ/mole. c. +5700 kJ/mole. d. -0.057 kJ/mole. 8.
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This note was uploaded on 03/20/2008 for the course BIO 311C taught by Professor Satasivian during the Spring '08 term at University of Texas at Austin.

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Exam_3 - BIOLOGY 311C - Brand Spring 2007 NAME (printed...

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