BIO 1107 Exam 3 - Practice Exam 3 BIOL 1107 - DerVartanian...

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Practice Exam 3 Name ______________________________ BIOL 1107 - DerVartanian Spring 2008 1) Which of the following statements is (are) correct about an oxidation-reduction (or redox) reaction? A) The molecule that is oxidized loses electrons. B) The molecule that is reduced gains electrons. C) The molecule that is reduced loses electrons. D) The molecule that is oxidized gains electrons. E) Both A and B are correct. 1) 2) The oxygen consumed during cellular respiration is involved directly in which process or event? A) glycolysis B) the phosphorylation of ADP to form ATP C) the oxidation of pyruvate to acetyl CoA D) accepting electrons at the end of the electron transport chain E) the citric acid cycle 2) 3) Which process in eukaryotic cells will proceed normally whether oxygen (O 2 ) is present or absent? A) chemiosmosis B) glycolysis C) oxidative phosphorylation D) electron transport E) the citric acid cycle 3) 1
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Refer to Figure 9.1 to answer the following questions. Figure 9.1 illustrates some of the steps (reactions) of glycolysis in their proper sequence. Each step is lettered. Use these letters to answer the questions. Figure 9.1 4) Which step shows a split of one molecule into two smaller molecules? 4) 5) In which step is an inorganic phosphate added to the reactant ?5 ) 6) Which kind of metabolic poison would most directly interfere with glycolysis? A) An agent that reacts with NADH and oxidizes it to NAD + B) An agent that reacts with oxygen and depletes its concentration in the cell C) An agent that blocks the passage of electrons along the electron transport chain D) An agent that binds to pyruvate and inactivates it E) An agent that closely mimics the structure of glucose but is not metabolized 6) 7) Starting with one molecule of citrate and ending with oxaloacetate, how many ATP molecules can be formed from oxidative phosphorylation (chemiosmosis)? A) 4 B) 1 C) 12 D) 3 E) 11 7) 8) Where do the catabolic products of fatty acid breakdown enter into the citric acid cycle? A) a -ketoglutarate B) malate or fumarate C) succinyl CoA D) pyruvate E) acetyl CoA 8) 2
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9) Where are the proteins of the electron transport chain located?
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BIO 1107 Exam 3 - Practice Exam 3 BIOL 1107 - DerVartanian...

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