What reactions of respiration are considered the tricarboxylic acid cycle? Select one or more: a. Ethanol Fermentation b. Lactate Fermentation c. Citric Acid Cycle d. Pyruvate Prep e. Electron Transport System f. Glycolysis
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- Put the following pathways in the order they occurduring aerobic respiration.a. electron transfer phosphorylationb. acetyl–CoA formationc. citric acid cycled. glycolysisWhich of the following statements about aerobic respiration is true? a. Oxygen is the final electron acceptor in the citric acid cycle. b. Coenzyme-A is a substrate in the reaction that generates a key reactant for the citric acid cycle. c. Redox reactions occur in the electron transport chain (ETC), but not during the citric acid cycle and not during glycolysis. d. The citric acid cycle is the main ATP producer in aerobic respiration.What fundamental difference sets apart anaerobic respiration from aerobic respiration? a. Anaerobic respiration does not have Krebs Cycle. b. Anaerobic respiration does not have an electron transport chain. c. Anaerobic respiration involves substrate-level phosphorylation only. d. Anaerobic respiration utilizes electronegative compounds such as nitrates as final electron acceptor.
- Which process in the respiration pathway produces pyruvate, ATP, and NADH? Incorrect Answer: C. Citric acid cycle Correct Answer: A. Glycolysis. Rationale:Which of the following is NOT a process of aerobic respiration? oxidative phosphorylation A. acetyl CoA formation lactate fermentation citric acid cycle OD. B.Which of the following is one difference between fermentation and anaerobic respiration? a. Fermentation uses oxygen to produce ATP and anaerobic respiration does not b. Fermentation harvests more energy from each sugar molecule than anaerobic respiration. c. Anaerobic respiration utilizes an electron transport chain while fermentation does not d. Anaerobic respiration utilizes glycolysis while fermentation does not.
- Beside each compound listed, indicate what stage or stages of cellular respiration it is associated with by placing an 'X' in each applicable box. Compound Glycolysis Pyruvate Oxidation Kreb's Cycle ETC/Chemiosmosis a. ATP b. Acetyl-CoA c. Citric Acid d. Coenzyme A e. Glucose f. Pyruvate g. FADH2 h. ATP synthase i. CO2 j. H2O k. O2Compare lactic acid fermentation and alcohol fermentation as both known as anaerobic respiration. * A. Water is added only with alcohol fermentation. B. Pyruvate is reduced by NADH only in alcohol fermentation. C. Carbon dioxide is released only with lactic acid fermentation D. Lactic acid fermentation ends with a 3 carbon compound while alcohol fermentation ends with a 2-carbon compound.Which of the following statements about the TCA cycle is INCORRECT? O a. The TCA cycle can recover much more energy than homolactic fermentation. b. All reactions of the TCA cycle take place in the mitochondria. C. The energy released in the TCA cycle is mainly stored in the reduced electron carriers NADH and FADH₂. O d. Under anaerobic conditions the TCA cycle is used to oxidize pyruvate. Oe. The TCA cycle is also called the citric acid cycle after the product of the first reaction catalyzed by pyruvate dehydrogenase.
- Which of the following is the second step of Citric Acid Cycle? Select one: a. Isocitrate and then decarboxylated and oxidized to produce alpha-ketoglutarate, Carbon dioxide and NADH b. Succinyl-CoA becomes Succinate and forms one ATP molecule and Coenzyme A-SH c. alpha-ketoglutarate is oxidized and decarboxylated to produce Succinyl-CoA, Carbon dioxide and NADH d. Malate is oxidized to become oxaloacetate forming NADH e. Fumarate is combined with water to become Malate f. Citrate is rearranged to become Isocitrate g. Pyruvate is decarboxylated to become acetyl-CoA producing NADH and Carbon dioxide h. Oxaloacetate combines with the acetyl from acetyl-CoA to produce Citric acid(citrate) i. Succinate is oxidized to become fumarate forming FADH2Which of the following glycolytic enzymes neither produces nor consumes ATP? A. phosphofructokinaseB. triose phosphate isomeraseC. pyruvate kinaseD. phosphoglycerate kinaseE. hexokinaseWhich of the following statements about the TCA cycle is INCORRECT? a. All reactions of the TCA cycle take place in the cytosol. b. The energy released in the TCA cycle is mainly stored in the reduced electron carriers NADH and FADH2. c. The TCA cycle can recover much more energy than homolactic fermentation. d. Under aerobic conditions the TCA cycle is used to oxidize pyruvate. e. The TCA cycle is also called the citric acid cycle after the product of the first reaction catalyzed by pyruvate dehydrogenase.