27. Which of the following is an important lipid in red blood cell membrane?
(A) cholesterol
(B) cholesteryl ester
(C) triacylglycerol
(D) bile acid
(E) Free fatty acid

28. Which of the following is not a ketone body? (A) acetone (B) acetyl-CoA(C) acetoacetate (D) -3-hydroxybutyrate (E) none of above

29. Which of the following is an activator of Lecithin-cholesterol acyltransferse? (A) Apo A-I (B) Apo B-48 (C) Apo B-100 (D) Apo C-II (E) Apo E

30. What is the major target of statins (a group of hypocholesterolemic drug)? (A) Cholesterol 7 -hydroxylase (B) Fatty acid synthase (C) HMG-CoA reductase (D) acetyl-CoA carboxylase (E) acyl-CoA synthetase

31. What are the general characteristics of catabolism in biological systems? (A) endergonic reaction and ATP consumption (B) endergonic reaction and ATP generation (C) exergonic reaction and ATP consumption (D) exergonic reaction and ATP generation (E) no energy changes.

32. Which following group of oxidoreductases does catalase belong to? (A) oxidases (B) dehydrogenases (C) hydroperoxidases (D) oxygenases (E) hydroxylases.

33. Which enzyme is not involved in glycogen synthesis from glucose to glycogen? (A) hexokinase (B) glucan transferase (C) phosphoglucomutase (D) UDPGIc pyrophosphorylase (E) glycogen synthase.

34. What is one unit of urea biosynthesized from? (A) two units of NH4+ and one unit of CO2 (B) one unit of as well as one ne unit of carboxyl and amino groups of arginine (C) one unit of , one carboxyl group of aspartate, and one unit of amino group of arginine (D) one unit of , one carboxyl group of arginine, and one unit of amino group of aspartate (E) one unit of , one unit of CO2 and one unit of amino group of aspartate.

35. Which following enzyme is not in mitochondria? (A) uroporphyrinogen decarboxylase (B) protoporphyrinogen oxidase (C) ferrochelatase (D) carbamoyl phosphate synthase I (E) ornithine transcarbamoylase.

36. Which of the following structure is the correct Fischer projection of D-glucose? (A)(B)(C)(D)(E)

37. Three among the ten glycolytic enzymes catalyze chemical reactions which are principally irreversible in physiological conditions. They are (A) Hexokinase, phosphofructokinase-1, pyruvate kinase (B) Hexokinase, phosphoglycerate kinase, pyruvate kinase (C) Hexokinase, phosphofructokinase-1, phosphoglycerate kinase (D) phosphofructokinase-1, phosphoglycerate kinase, pyruvate kinase (E) None of the above

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