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FATS AND FATTY ACID METABOLISM- Part 6
See all quizzes of FATS AND FATTY ACID METABOLISM- Part 6 here:
1. The nitrogenous base in lecithin is
(A) Ethanolamine (B) Choline
(C) Serine (D) Betaine
82 MCQs IN BIOCHEMISTRY
2. All the following are omega-6-fatty acids
except
(A) Linoleic acid (B) α-Linolenic acid
(C) γ-Linolenic acid (D) Arachidonic acid
3. All the following have 18 carbon atoms
except
(A) Linoleic acid (B) Linolenic acid
(C) Arachidonic acid (D) Stearic acid
4. A 20-carbon fatty acid among the following
is
(A) Linoleic acid (B) α -Linolenic acid
(C) β -Linolenic acid (D) Arachidonic acid
5. Triglycerides are transported from liver to
extrahepatic tissues by
(A) Chylomicrons (B) VLDL
(C) HDL (D) LDL
6. Cholesterol is transported from liver to
extrahepatic tissues by
(A) Chylomicrons (B) VLDL
(C) HDL (D) LDL
7. Elevated plasma level of the following
projects against atherosclerosis:
(A) Chylomicrons (B) VLDL
(C) HDL (D) LDL
8. All the following amino acids are nonessential
except
(A) Alanine (B) Histidine
(C) Cysteine (D) Proline
9. Sulphydryl group is present in
(A) Cysteine (B) Methionine
(C) Both (A) and (B) (D) None of these
10. Oligosaccharide-pyrophosphoryl dolichol
is required for the synthesis of
(A) N-linked glycoproteins
(B) O-linked glycoproteins
(C) GPI-linked glycoproteins
(D) All of these
11. In N-linked glycoproteins, oligosaccharide
is attached to protein through its
(A) Asparagine residue (B) Glutamine residue
(C) Arginine residue (D) Lysine residue
12. De hovo synthesis of fatty acids occurs in
(A) Cytosol (B) Mitochondria
(C) Microsomes (D) All of these
13. Acyl Carrier Protein contains the vitamin:
(A) Biotin (B) Lipoic acid
(C) Pantothenic acid (D) Folic acid
14. Which of the following is required as a
reductant in fatty acid synthesis?
(A) NADH (B) NADPH
(C) FADH2 (D) FMNH2
15. Hepatic liponenesis is stimulated by:
(A) cAMP (B) Glucagon
(C) Epinephrine (D) Insulin
16. De novo synthesis of fatty acids requires
all of the following except
(A) Biotin (B) NADH
(C) Panthothenic acid (D) ATP
17. Acetyl CoA carboxylase regulates fatty
acid synthesis by which of the following
mechanism?
(A) Allosteric regulation
(B) Covalent modification
(C) Induction and repression
(D) All of these
18. β-Oxidation of fatty acids requires all the
following coenzymes except
(A) CoA (B) FAD
(C) NAD (D) NADP
19. Which of the following can be oxidized
by β-oxidation pathway?
(A) Saturated fatty acids
(B) Monosaturated fatty acids
(C) Polyunsaturated fatty acids
(D) All of these
20. Propionyl CoA is formed on oxidation of
(A) Monounsaturated fatty acids
(B) Polyunsaturated fatty acids
(C) Fatty acids with odd number of carbon atoms
(D) None of these
21. An enzyme required for the synthesis of
ketone bodies as well as cholesterol is
(A) Acetyl CoA carboxylase
(B) HMG CoA synthetase
(C) HMG CoA reductase
(D) HMG CoA lyase
22. Ketone bodies are synthesized in
(A) Adipose tissue (B) Liver
(C) Muscles (D) Brain
23. All the following statements about ketone
bodies are true except
(A) Their synthesis increases in diabetes mellitus
(B) They are synthesized in mitchondria
(C) They can deplete the alkali reserve
(D) They can be oxidized in the liver
24. All the following statements about
carnitine are true except
(A) It can be synthesised in the human body
(B) It can be synthesized from methionine and lysine
(C) It is required for transport of short chain fatty
acids into mitochondria
(D) Its deficiency can occur due to haemodialysis
25. Which of the following can be synthesized
in the human body if precurors are
available?
(A) Oleic acid (B) Palmitoleic acid
(C) Arachidonic acid (D) All of these
26. All the following can be oxidized by β-
oxidation except
(A) Palmitic acid
(B) Phytanic acid
(C) Linoleic acid
(D) Fatty acids having an odd number of carbon
atoms
27. Anti-inflammatory corticosteroids inhibit
the synthesis of
(A) Leukotrienes (B) Prostaglandins
(C) Thromboxanes (D) All of these
28. Diets having a high ratio of polyunsaturated:
saturated fatty acids can cause
(A) Increase in serum triglycerides
(B) Decrease in serum cholesterol
(C) Decrease in serum HDL
(D) Skin lesions
29. Thromboxanes cause
(A) Vasodilation
(B) Bronchoconstriction
(C) Platelet aggregation
(D) All of these
30. Prostaglandins lower camp in
(A) Adipose tissue (B) Lungs
(C) Platelets (D) Adenohypophysis
