Stc17ak - Self Test Chapter 17 Key 1 The citric acid cycle...

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Self Test Chapter 17 Key 1.) The citric acid cycle is an example of an amphibolic pathway. (A) True (B) False 2.) The molecule shown is: (A) Biotin (B) Coenzyme A (C) Acetyl-CoA (D) Flavin mononucleotide (E) Lipoamide 3.) The molecule shown above is a cofactor of: (A) Succinate Dehydrogenase (B) Citrate Synthase (C) α -Ketoglutarate dehydrogenase (D) Succinyl-CoA synthetase (E) Pyruvate carboxylase 4.) Which one of the following enzymes of the citric acid cycle catalyzes an irreversible step? (A) Isocitrate dehydrogenase (B) Succinate dehydrogenase (C) Succinyl-CoA Synthetase (D) Fumarase (E) Malate dehydrogenase 5.) Which of the following conditions decreases the rate of oxidation of acetyl-CoA by the citric acid cycle? (A) A low ATP/ADP ratio (B) A low NAD + /NADH ratio (C) A low GTP/GDP ratio (D) A high NAD + /NADH ratio (E) An increase in Ca 2+ concentration. 5.) In eukaryotes the enzymes of the citric acid cycle are found in the cytosol. (A) True (B) False 6.) The citric acid cycle is an anaerobic pathway. (A) True (B) False 7.) The only reaction in the citric acid cycle that produces a carbon-carbon bond is catalyzed by citrate synthase. (A) True (B) False 8.) Which enzyme is unique to the glyoxylate cycle? (A) Malic enzyme (B) Malate dehydrogenase (C) Isocitrate lyase (D) PEP carboxylase (E) Pyruvate carboxylase 9.) The only reaction of the citric acid cycle that provides substrate level phosphorylation is catalyzed by: (A) Pyruvate dehydrogenase (B) Malate dehydrogenase (C) Isocitrate dehydrogenase (D) Succinate dehydrogenase (E) Succinyl-CoA synthetase S S H N H NH O H O
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10.) The molecule shown is: (A) Biotin (B) Coenzyme A (C) FAD (D) Flavin mononucleotide (E) Lipoamide 11.) The molecule shown above is a cofactor of: (A) Succinate Dehydrogenase (B) Citrate Synthase (C) Isocitrate dehydrogenase (D) Succinyl-CoA synthetase (E) Pyruvate carboxylase 12.) Which one of the following enzymes of the citric acid cycle catalyzes an irreversible step? (A) Succinyl-CoA Synthetase (B) Succinate dehydrogenase (C) Citrate Synthase (D) Fumarase (E) Malate dehydrogenase 13.) In mammalian tissues, isocitrate dehydrogenase is allosterically stimulated by (A) A high ATP/ADP ratio (B) A low NAD + /NADH ratio (C) A low acetyl CoA/CoA ratio (D) A high NAD + /NADH ratio (E) An decrease in Ca 2+ concentration. 14.) In eukaryotes the enzymes of the citric acid cycle are found in the mitochondria. (A) True (B) False 15.) The citric acid cycle is an anaerobic pathway. (A) True (B) False 16.) The only reaction in the citric acid cycle that produces substrate level phosphorylation is catalyzed by citrate synthase. (A) True (B) False 17) All of the statements below about the glyoxylate pathway are true EXECPT: (A) The enzymes of the glyoxylate pathway are found in the glyoxysomes. (B) The glyoxysomes contain all of the enzymes of the citric acid cycle.
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Stc17ak - Self Test Chapter 17 Key 1 The citric acid cycle...

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