31. Which of the following lipids is not a saturated fatty acid?
(A) lauric acid
(B) linoleic acid.
(C) myristic acid.
(D) stearic acid.
(E) arachidic acid.

32. Which of the following best describes the cholesterol molecule? (A) Nonpolar, charged. (B) Nonpolar, uncharged. (C) Amphipathic. (D) Polar, charged. (E) Polar, uncharged.

33. The primary storage form of lipid is _____ and it is normally stored in the _____. (A) Phospholipid； liver. (B) cholesterol； muscles. (C) monoacylglycerol； adipocytes (D) triacylglycerols； adipocytes. (E) triacylglycerols； liver.

34. Which of the following molecules or substances contain, or are derived from, fatty acids? (A) sphingolipids. (B) prostaglandins. (C) beeswax. (D) prostaglandins and sphingolipids (E) prostaglandins、sphingolipids and beeswax.

35. Aspirin inhibits the synthesis of which of the following sets of eicosanoids? (A) prostagland E2 and leukotriene A4. (B) thromboxane A2 and leukotriene C4. (C) prostaglandin F2 and thromboxane A2. (D) prostaglandin A2 and 5-hydroperoxyeicosatetraenoic acid (5-HPETE). (E) all of them.

36. Which of the following is on the surface of a lipoprotein particle? (A) cholesterol and phospholipids (B) cholesterol and triacylglycerol (C) cholesterol ester and phospholipids (D) cholesterol ester and triacylglycerol (E) phospholipids and triacylglycerol

37. All of the following statement associated with plasma lipoproteins are true EXCEPT: (A) They have a nonpolar core consisting of triacylglycerols and cholesterol esters. (B) VLDL is the vehicle that liver uses to deliver triacylglycerols to the periphery. (C) They are the only carriers of lipid-based energy in the blood. (D) LDL function is to carry cholesterol to tissues. (E) HDL functions by carrying cholesterol away from tissues.

38. Dietary lipids are "packaged" in the intestine into ____ for transport in the blood stream. (A) HDL, (B) IDL, (C) VLDL, (D) Chylomicrons, (E) LDL.

39. Which of the following protein binds to LDL receptor? (A) ApoAI. (B) ApoB-48. (C) ApoC-II. (D) ApoD (E) ApoE.

40. Which of the following conditions would most likely result in the accumulation of cholesterol in extrahepatic tissues? (A) a deficiency in lipoprotein lipase. (B) a deficiency in acyl CoA:cholesterol acyltransferase. (C) a deficiency in apoprotein A-I. (D) a high level of HDL. (E) a high level of lecithin -cholesterol acyltransferase.

(1) hydrolysis of peptide bonds on the carboxyl side of Lys and Arg. (AB) CNBr (cyanogen bromide). (AC) Edman reagent (phenylisothiocyanate). (AD) Sanger reagent (FDNB, fluorodinitrobenzene). (AE) dithiothreitol. (BC) ẞ-mercaptoethanol. (BD) chymotrypsin. (BE) trypsin. (CD) performic acid.

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