Name: C) glycine D) serine 18. Glutamic acid can be formed in one enzyme-catalyzed step from A) malic acid B) succinic a

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Name C Glycine D Serine 18 Glutamic Acid Can Be Formed In One Enzyme Catalyzed Step From A Malic Acid B Succinic A 1 (32.51 KiB) Viewed 135 times

Name C Glycine D Serine 18 Glutamic Acid Can Be Formed In One Enzyme Catalyzed Step From A Malic Acid B Succinic A 2 (32.51 KiB) Viewed 135 times

Name C Glycine D Serine 18 Glutamic Acid Can Be Formed In One Enzyme Catalyzed Step From A Malic Acid B Succinic A 3 (35.18 KiB) Viewed 135 times

Name: C) glycine D) serine 18. Glutamic acid can be formed in one enzyme-catalyzed step from A) malic acid B) succinic acid C) alpha-ketoglutaric acid D) oxaloacetic acid 19. Which of the following is direct precursor of Serine? A) Methionine B) 3-Phosphoglycerate C) Pyruvate D) Oxaloacetate 20. When cysteine is catabolized, its carbon atoms appear as A) alpha-ketoglutarate B) homocysteine C) pyruvate D) oxaloacetate 21. Two amino acids which are converted readily to cxaloacetate for energy metabolism are: A) lysine and leucine B) aspartate and asparagine C) cysteine and serine D) methionine and valine 22. Proline can be synthesized in mammals most directly from A) glycine. B) serine. C) aspartate. D) glutamate. 23. Which of the following amino acids is considered exclusively ketogenic? A) leucine: B) arginine C) valine D) aspartic acid 24. All of the following are intermediates of the Krebs cycle EXCEPT A) pyruvate. B) fumarate. C) succinyl-CoA. D) malate. 25. The enzymes of the electron transport chain are A) in the cytosol. B) on the outer membrane of the mitochondria. C) on the inner membrane of the mitochondria. D) in the mitochondrial matrix.
Final metabolism exam Name: 26. which of the following enzymes catalyzes the acetyl CoA utilization by the Krebs cycle? A) isocitric dehydrogenase B) citrate synthase. C) succinatethiokinase. D) pyruvate dehydrogenase 27. How many molecules of NAD" are reduced as one molecule of acetyl CoA is metabolized through one turn of the Krebs cycle? A) 1 B) 2 C) 3 D) 4 28. How many moles of ATP can be formed during the complete oxidation of 10 mole of pyruvate to carbon dioxide and water in normal liver cells? A) 90 B) 110 C) 150 D) 360 29. All of the following must be catabolized to acetyl CoA before entering the Krebs cycle EXCEPT A) palmitate. B) glucose. C) alanine. D) glutamate. 30. Which of the following enzymes catalyzes the breakdown of F-1,6-bisphosphate to G-3-p and DHAP in the glycolytic pathway? A) isomerase B) aldolase.. C) hexokinase. D) dehydrogenase. 31. Which of the following compounds is a key intermediate in gluconeogenesis from lactate, pyruvate, and alanine? A) ornithine B) acetyl-CoA C) oxaloacetate D) malonyl-CoA 32. The net products of anaerobic glycolysis are A) ATP, lactate B) ATP, pyruvate C) NADH, lactate D) ATP, acetyl-CoA 33. Which of following is a substrate for the pyruvate kinase? A) phosphoenolpyruvate. B) oxaloacetate