CH369 finalexams04 - CH 369 Final Exam - Spring 2004 1. The...

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CH 369 Final Exam - Spring 2004 1. The glycosidic bond in the disaccharide below can be categorized as a(n) _________________ glycosidic bond. a. α (1 2) b. α (1 4) c. α (1 6) d. β (1 4) e. β (1 6) 2. As written in the following reaction, _____________________ is the reducing agent. ½ O 2 + NADH + H + H 2 O + NAD + a. O 2 b. NADH c. H + d. H 2 O e. NAD + 3. Coenzymes, such as FADH 2 and NADH, are frequently required in _________________ reactions. a. carboxylation b. oxidation-reduction c. transamination d. acyl transfer e. aldehyde transfer 4. In the mitochondria, electrons from FADH 2 enter the electron transport chain via a. Complex I b. Complex II c. Complex III d. Complex IV e. They do not enter the electron transport chain at all.
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5. Coenzyme Q of the electron transport chain in mitochondria a. is loosely bound to the outer surface of the inner mitochondrial membrane. b. directly accepts electrons from NADH to enter the electron transport chain. c. transports electrons from Complex III to Complex IV. d. contains many iron-sulfur clusters that are continuously reduced and reoxidized. e. is capable of transferring one electron at a time to the next component in the chain. 6. What is utilized to transport acyl-CoA across the inner mitochondrial membrane? a. glycerol-phosphate shuttle b. acyl translocase c. carnitine d. malate-aspartate shuttle e. biotin 7. ____________________ serve to emulsify fats in the intestines. a. Serum albumins b. Lipases c. Chylomicrons d. Bile salts e. Apolipoproteins 8. Palmitic acid is a 16-carbon saturated fatty acid molecule. During β -oxidation, it would produce ___________ molecules of acetyl-CoA, _________ molecules of NADH, and ___________ molecules of FADH 2 . a. 8 8 8 b. 8 7 8 c. 8 8 7 d. 8 7 7 e. 7 8 8 9. In the catabolism of fatty acids, put the following steps in the order in which they naturally occur. I. Transport of a fatty acid across the outer mitochondrial membrane. II. Transport of a fatty acid across the inner mitochondrial membrane. III. Hydrolysis of triacylglycerols by lipases. IV. Formation of a thioester bond between the carboxyl group of fatty acid and the thiol group of coenzyme A. a. III, IV, I, II b. I, II, IV, III c. III, I, II, IV d. III, II, I, IV e. I, III, II, IV
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10. This base is a(n) ________________________. a. adenine b. cytosine c. guanine d. thymine e. uracil 11. The main function of the electron transport chain is to a. is to form oxygen from water in the body. b. dissipate the pH gradient with the concomitant production of ATP. c. make the mitochondrial membrane “leaky” to proton transport. d. pump protons from the matrix to the intermembrane space. e.
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CH369 finalexams04 - CH 369 Final Exam - Spring 2004 1. The...

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