BIO 311C_Exam2 - Bio 311C Exam 2 Introductory Biology I...

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Bio 311C - Exam 2 Introductory Biology I Fall 2007 1 Name: ________________________________________ EID:_________________ Select the best answer for the following questions and fill in the corresponding bubble on the answer sheet. Please answer the short answer and essay questions directly on your exam. Use PENCIL for the multiple choice. Use PEN for the short answer and essay (if you wish to be considered for regrade-ing). You have 50 minutes. Take a deep breath – and Good Luck!! 1. Which term most precisely describes the cellular process of breaking down large molecules into smaller ones? A) metabolism B) anabolism C) dehydration D) catabolism 2. Whenever energy is transformed, there is always an increase in the A) free energy of the system. B) free energy of the universe. C) entropy of the universe. D) enthalpy of the universe. 3. Which of the following types of reactions would decrease the entropy within a cell? A) dehydration reactions B) hydrolysis C) respiration D) digestion 4. What is the consequence for a cell at chemical equilibrium? A) chemical equilibrium is essential for life B) the cell is operating at full capacity C) the cell has no energy available to do work D) the cell will be unstable 5. A chemical reaction that has a positive Δ G is correctly described as A) endergonic B) spontaneous C) energy releasing D) exothermic 6. A solution of starch at room temperature does not readily decompose to form a solution of simple sugars because A) the starch solution has less free energy than the sugar solution. B) the hydrolysis of starch to sugar is endergonic. C) the activation energy barrier for this reaction cannot be overcome quickly. D) starch cannot be hydrolyzed in the presence of so much water.
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Bio 311C - Exam 2 Introductory Biology I Fall 2007 2 7. An enzyme catalyzes a reaction by A) supplying the energy to speed up a reaction. B) lowering the energy of activation of a reaction. C) lowering the Δ G of a reaction . D) increasing the amount of free energy of a reaction. 8. The active site of an enzyme is the region that A) binds allosteric regulators of the enzyme. B) is involved in the catalytic reaction of the enzyme. C) binds the products of the catalytic reaction. D) both A and B 9. What is the term used for the metabolic pathway in which glucose (C 6 H 12 O 6 ) is degraded to carbon dioxide (CO 2 ) and water? A) cellular respiration B) glycolysis C) fermentation D) citric acid cycle E) oxidative phosphorylation 10. Which of the following statements is (are) correct about an oxidation-reduction (or redox) reaction? A) The molecule that is reduced gains electrons. B) The molecule that is oxidized loses electrons.
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BIO 311C_Exam2 - Bio 311C Exam 2 Introductory Biology I...

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