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SC BIOL 425 - Chapter 06

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Chapter 6: RespirationMultiple-Choice Questions1. An Overview of Glucose Oxidation; p. 107; easy; ans: cWhich of the following statements about the reactions of glucose oxidation is FALSE?a. The glucose molecule is hydrolyzed.b. Hydrogen atoms are removed. c. Oxygen is oxidized.d. Energy is released.e. Electrons go from higher to lower energy levels.2. An Overview of Glucose Oxidation; p. 108; easy; ans: bWhich of the following statements concerning fermentation is FALSE?a. It occurs under anaerobic conditions.b. It involves O2 as the ultimate electron acceptor.c. It involves the breakdown of organic molecules.d. It releases less than 686 kcal/mole of glucose.e. It is an exergonic process.3. An Overview of Glucose Oxidation; p. 108; easy; ans: aWhich of the following does NOT occur during respiration?a. hydrolysis of starch to glucoseb. formation of acetyl CoAc. electron transport chaind. citric acid cyclee. glycolysis 4. An Overview of Glucose Oxidation; p. 108; moderate; ans: eFormation of ATP from ADP and phosphate as a result of electron transport occurs in:a. the citric acid cycle.b. the formation of acetyl CoA.c. fermentation.d. glycolysis.e. oxidative phosphorylation.5. An Overview of Glucose Oxidation; p. 108; easy; ans: eIn respiration, most of the energy in the original glucose molecule is:a. stored in molecules of ADP.b. stored in molecules of ATP.c. stored in molecules of pyruvate.d. released in molecules of carbon dioxide.e. released as heat.6. Glycolysis; p. 108; easy; ans: c In glycolysis, one molecule of glucose is converted to ______ molecules of ______.a. two; fructoseb. three; fructose.c. two; pyruvated. three; pyruvatee. two; sucrose7. Glycolysis; p. 108; easy; ans: b Which of the following statements concerning glycolysis is FALSE?a. It is considered a primitive process. b. It is an aerobic process.c. It occurs in a series of 10 steps.d. It is carried out by virtually all cells.e. Its reactions are catalyzed by specific enzymes.8. Glycolysis; p. 108; easy; ans: aWhere in the cell does glycolysis occur?a. the cytosolb. mitochondriac. the nucleusd. the endoplasmic reticulume. chloroplasts 9. Glycolysis; p. 108; moderate; ans: eWhen one speaks of the cell’s “net energy harvest” from glycolysis one is referring to the amount of:a. ATP only.b. ADP only.c. NAD+ only.d. NADH onlye. ATP and NADH.10. Glycolysis; p. 108; easy; ans: aThe preparatory phase of glycolysis involves:a. 2 molecules of ATP only.b. 2 molecules of NAD+ only.c. 2 molecules of NADH only.d. 1 molecule of ATP and 1 molecule of NADH.e. 1 molecule of ATP and 1 molecule of NAD+.11.Glycolysis; p. 108; difficult; ans: cAs part of the first step in the first preparatory reaction of glycolysis:a. the glucose molecule is rearranged.b. the glucose molecule is split in half.c. glucose is phosphorylated.d. NAD+ is reduced.e. NADH is oxidized.12. Glycolysis; p. 108; moderate; ans: cFor every molecule of glucose that begins glycolysis, how many ATP molecules are consumed?a. 0b. 1c. 2d. 3e. 413.Glycolysis; p. 109; difficult; ans: aAs part of the cleavage step in glycolysis, glucose is:a. converted to glyceraldehyde 3-phosphate and dihydroxyacetone phosphate.b. phosphorylated to glucose 6-phosphate.c. oxidized to 1,3-bisphosphoglycerate.d. reduced to phosphoenolpyruvate.e. converted by the enzyme isomerase to fructose.14.Glycolysis; pp. 109–110; moderate; ans: cFor each molecule of glucose that completes glycolysis, how many NAD+ molecules are reduced? a. 0b. 1c. 2d. 3e. 415. Glycolysis; pp. 109-110; moderate; ans: eFor every glucose molecule that completes glycolysis, how many total molecules of ATP are produced?a. 0b. 1c. 2d. 3e. 416.Glycolysis; p. 110; moderate; ans: cIn glycolysis, what is the net energy harvest of ATP molecules per molecule of glucose?a. 0b. 1c. 2d. 3e. 417. The Aerobic Pathway; p. 110; easy; ans: bMost of the enzymes of the citric acid cycle are found in the _____ of the _____.a. cytosol; cellb. matrix; mitochondriac. lumen; smooth ERd. cristae; mitochondriae. ribosomes; rough ER18. The Aerobic Pathway; p. 111; moderate; ans: bPyruvate is converted to acetyl CoA in the ____ of the _____.a. cytosol; cellb. matrix; mitochondriac. lumen; smooth ERd. cristae; mitochondriae. ribosomes; rough ER19. The Aerobic Pathway; p. 111; moderate; ans: c For every molecule of glucose that begins glycolysis, how many molecules of acetyl CoA are produced?a. 0b. 1c. 2d. 3e. 420. The Aerobic Pathway; p. 111; difficult; ans: aDuring the conversion of pyruvate to acetyl CoA, _____ is produced.a. CO2b. ATPc. NAD+d. ADPe. 3-phosphoglycerate21.The Aerobic Pathway; p. 111; moderate; ans: cUpon entering the citric acid cycle, the acetyl group combines with ______ to produce ______.a. coenzyme A; pyruvateb. glucose; glucose 6-phosphatec. oxaloacetate; citrated. oxaloacetate; carbon dioxidee. NADH; citrate22.The Aerobic Pathway; p. 111; moderate; ans: eAfter acetyl CoA enters the citric acid cycle, the coenzyme A portion of the molecule:a. combines with oxaloacetate.b. combines with citrate.c. is oxidized.d. is reduced.e. is released.23.The Aerobic Pathway; p. 111; difficult; ans: dWhich of the following does NOT occur during the citric acid cycle?a. decarboxylationb. substrate-level phosphorylationc. oxidationd. oxidative phosphorylatione. regeneration of oxaloacetate24.The Aerobic Pathway; p. 111; easy; ans: bIn each turn of the citric acid cycle, how many molecules of ATP are produced?a. 0b. 1c. 2d. 3e. 425.The Aerobic Pathway; p. 111; moderate; ans: cIn the citric acid cycle, how many molecules of FADH are produced per molecule of glucose?a. 0b. 1c. 2d. 3e. 426.The Aerobic Pathway; p. 111; moderate; ans: eIn the citric acid cycle, how many molecules of NADH are produced per molecule of glucose?a. 0b. 1c. 2d. 4e. 627.The Aerobic Pathway; p. 112; easy; ans: dMost of the carriers of the electron transport chain are:a. in the cytosol.b. in the mitochondrial matrix.c. contained between the outer and inner mitochondrial membranes.d. embedded in the inner mitochondrial membrane.e. embedded in the outer mitochondrial membrane.28.The Aerobic Pathway; p. 113; difficult; ans: eWhich of the following statements about iron-sulfur proteins is FALSE?a. They are components of the electron transport chain.b. Their iron is not attached to a porphyrin ring.c. Their iron is attached to sulfides.d. Their iron is attached to the sulfur of sulfur-containing amino acids.e. They carry electrons and protons.29.The Aerobic Pathway;


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