Chapter 9 Questions-1

Chapter 9 Questions-1 - Ch 9 Multiple Choice Identify the...

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Ch 9 Multiple Choice Identify the letter of the choice that best completes the statement or answers the question. ____ 1. What is the term for metabolic pathways that release stored energy by breaking down complex molecules? a. anabolic pathways b. catabolic pathways c. fermentation pathways d. thermodynamic pathways e. bioenergetic pathways ____ 2. 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 ____ 3. Which of the following statements concerning the metabolic degradation of glucose (C 6 H 12 O 6 ) to carbon dioxide (CO 2 ) and water is (are) true ? a. The breakdown of glucose to carbon dioxide and water is exergonic. b. The breakdown of glucose to carbon dioxide and water has a free energy change of -686 kcal/mol. c. The breakdown of glucose to carbon dioxide and water involves oxidation-reduction or redox reactions. d. Only A and B are correct. e. A, B, and C are correct. ____ 4. 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. c. The molecule that is reduced loses electrons. d. The molecule that is oxidized gains electrons. e. Both A and B are correct. ____ 5. Which statement is not correct with regard to redox (oxidation-reduction) reactions? a. A molecule is reduced if it loses electrons. b. A molecule is oxidized if it loses electrons. c. An electron donor is called a reducing agent. d. An electron acceptor is called an oxidizing agent. e. Oxidation and reduction always go together. ____ 6. The molecule that functions as the reducing agent (electron donor) in a redox or oxidation-reduction reaction a. gains electrons and gains energy. b. loses electrons and loses energy. c. gains electrons and loses energy. d. loses electrons and gains energy. e. neither gains nor loses electrons, but gains or loses energy. ____ 7. When electrons move closer to a more electronegative atom, what happens? a. Energy is released. b. Energy is consumed. c. The more electronegative atom is reduced.
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d. The more electronegative atom is oxidized. e. A and C are correct. ____ 8. Why does the oxidation of organic compounds by molecular oxygen to produce CO2 and water release free energy? a. The covalent bonds in organic molecules are higher energy bonds than those in water and carbon dioxide. b. Electrons are being moved from atoms that have a lower affinity for electrons (such as C) to atoms with a higher affinity for electrons (such as O). . c.
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Chapter 9 Questions-1 - Ch 9 Multiple Choice Identify the...

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