Lipids%20Quiz%201%20Answers - group oxidation of hydroxyl...

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Answers to Lipid Quiz 1 Structures 1. Left column, top to bottom: stearic acid, carnitine Right column, top to bottom:palmitoyl-CoA, malonyl CoA, acetyl CoA Short Answers 2. linoleic acid, linolenic acid; we cannot make the delta12 or delta15 double bond. 3. fatty acids, triacylglycerols, glycerophospholipids, sphingolipids, steroids, and other lipids. See lecture notes for examples. 4. see lecture notes for structure, 18:1(delta9) is oleic acid. 5. see lecture notes for diagram; parts to be labeled are biotin carboxylase, biotin carrier protein with biotin on flexible arm, and transcarboxylase. 6. see lecture notes for thioester structure; thioester is more chemically reactive than the equivalent carboxylic acid or ester. 7. see lecture notes for the diagram of citrate shuttle system. 8. see lecture notes for the diagram of carnitine transport system. 9. the 4 reactions are formation of double bond, addition of water to give a hydroxyl
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Unformatted text preview: group, oxidation of hydroxyl group to keto group, and cleavage of alpha-beta bond. See handout for structures. 10. Similarities are 2 carbon units used in both, reaction mechanism involves beta carbon atom of acyl side chain; differences are location, acyl carrier, redox factors and polypeptide nature of the enzymes (single polypeptide for synthesis, multiple polypeptides for breakdown). True/False 11. T 12. F (FA cannot cross blood-brain barrier) 13. F (we can synthesize some unsaturated FA) 14. F (it is released as carbon dioxide) 15. F (they are made up of long chain fatty acids and alcohols joined by an ester bond) 16. T 17. F (FA are weak acids) 18. F (they are more soluble in organic solvents than aqueous solvents) 19. F (the outer membrane is permeable, the inner membrane is not) 20. T...
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This note was uploaded on 01/25/2010 for the course SCIENCE bioc300 taught by Professor Foster during the Spring '10 term at UBC.

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