1. LIPIDS
1. The following are essential amino acids:
a) Linoleic acid and Palmitic acid
b) Palmitic acid and Archidonic acid
c) Linolenic acid and Linoleic acid
d) Stearic acid and Linolenic acid
e) Linoleic acid and Arachidonic acid
2. Arachidonic Acid:
a) Is a branched fatty acid
b) Contains 3 double bonds
c) Is a precursor for eicosanoids
d) Contains 5 double bonds
e) Is a 20-carbon saturated fatty acid
3. A membrane phospholipids that contains glycerol is:
a) Phosphatidyl Choline
b) Sphingomyelin
c) Cerebroside
d) Ganglioside
e) Ceramide
4. Lipids are important in the human body because they act as:
a) Enzymes
b) Immune molecules
c) Lubricants
d) Stored genetic information
e) Energy source
5. The following compound is a simple lipid
a) Methionine
b) Lecithin
c) Cholesterol
d) Triacylglycerol
e) Amylopectin
6. Fatty acids:
a) Are always dicarboxylic
b) Are only composed of an even number of C atoms
c) Are obtained from the hydrolysis of triacylglycerol
d) Contains glycerol
e) Are the only components of cell membrane lipids

2. 7. The following are saturated fatty acids:
a) Linoleic acid and archidic acid
b) Palmitic acid and stearic acid
c) Linolenic acid and myristic acid
d) Stearic acid and linolenic acid
e) Oleic acid and lauric acid
8. Arachidonic acid is:
a) The same as arachidic acid
b) Essential fatty acid
c) The precursor of prostaglandins
d) Not found in membrane lipids
e) Is a 22-carbon compound
9. Membrane phospholipids which contain glycerol include:
a) Lecithin and cardiolipin
b) Sphingomyelin and lecithin
c) Cerebroside and Phosphatidyl serine
d) Cardiolipin and gangliosides
e) Ceramide and phosphatidyl inosital
10. Lipids are important in the human body because they act as:
a) Enzymes and hormones
b) Hormones and energy source
c) Coenzyme and enzymes
d) Stored genetic information
e) Energy source and lubricants
11. The following are derived lipids:
a) Vitamin D and methionine
b) Lecithin and cholesterol
c) Cholesterol and palmitic acid
d) Dolicol and coenzyme Q
e) Amylopectin and prostaglandins
12. Structural lipids include:
a) Gangliosides and aminoglycosides
b) Cerebrosides and cholesterol
c) Phenylaline and phosphatidylserine
d) Phosphatidylserine and glucosamine
e) Glycosaminoglycans and proteoglycans
13. Lipids are stored in mammalian tissues:
a) Starch
b) Triacylglycerol
c) Cholesterol
d) Estrogen
e) Fatty acids

3. 14. In mammals, cholesterol is:
a) A normal membrane constituent
b) Converted to cholic acid by intestinal bacteria
c) Important source of energy
d) Parent molecule for sphingolipids
e) Synthesized in the liver mitochondria
15. In digestion and absorption of lipids:
a) Bile pigments are important biological detergents
b) Hormone-sensitive lipase is secreted by the pancreas
c) Non-specific lipid esterase is the main digestive enzyme
d) Bile salts are important enhancers
e) TAG enters enterocytes directly
16. Unlike prostaglandins, thromboxanes:
a) Are derived from arachidonic acid
b) Are synthesized cyclooxygenase pathway
c) Are released by platelets
d) Act as local hormones
e) Have 20 carbons
17. Complex lipids include:
a) Gangliosides and peptidoglucans
b) Cerebrosides and cellulose
c) Phenylalanine and phosphatidylcholine
d) Phosphatidylserine and cholesterol
e) Glycosaminoglycans and chitin
18. Triacylglycerol and Glycogen:
a) Are storage form of energy in plants
b) Are polymers of glucose
c) Are storage form of energy in animals
d) Have the same energy yield on complete oxidation
e) Are mainly stored in the liver
19. A membrane phospholipids that does not contain glycerol is:
a) Lecithin
b) Sphingomyelin
c) Cerebroside
d) Cardiolipin
e) Ceramide
20. Unsaturated fatty acids:
a) Are obtained in the diet from animals
b) Are always in the cis configuration
c) Include linolenic acid and arachidonic acid
d) Give important derivatives
e) Are water soluble

4. 21. Phosphatidylcholine:
a) Is also known as lecithin
b) Is a major constituent of lung surfactant
c) Occurs in cell membranes
d) Can be obtained from phosphatidyl ethanolamine
e) All of the above is correct
22. Cholesterol is:
a) Found in plants
b) Membrane lipid
c) Non-amphipathic lipid
d) Precursor of bilirubin
e) A source of energy
23. Cerebrosides:
a) Include glucosylceramide
b) Are derived lipids
c) Contain sialic acid
d) Are glycerophospholipids
e) Are membrane glycoproteins
24. The following is an important function of cholesterol:
a) Synthesis of acetylcholine
b) Synthesis of prostaglandins
c) Formation of bile salts
d) Formation of phosphatidylcholine
e) Increasing membrane rigidity
25. Sphingomyelins:
a) Consist of phosphoric acid, choline and ceramide
b) Consist of ceramide, sphingosine and choline
c) Are glycosphingolipids
d) Are part of the skin pigment melanin
e) Are equally distributed in all tissues
26. The following is true about eicosanoids:
a) Prostacyclines inhibit platelet aggregation
b) Thromboxanes cause platelet aggregation
c) Prostaglandins enhance smooth muscle contraction
d) Leukotrienes are allergic mediators
e) All of the above is correct
27. The following are amphipathic membrane lipids:
a) Triacylglycerol and cholesterylester
b) Cholesteryl esters and cerebrosides
c) Cholesterol and fatty acid
d) Glycerophospholipds and sphingomyelins
e) Galactosyl ceramide and glycerol

5. 28. The following statement about simple lipids is true:
a) TAG's always contain similar fatty acids
b) Waxes are esters of fatty acids with high molecular weight polyhydric
alcohols
c) Glucosyl ceramide is the main simple lipid in extra-neural tissues
d) Some contain fatty acids with odd carbon number
e) Include only esters of fatty acids with glycerol
29. Complex lipids do not include:
a) Phosphatidyl inositol 4,5 biphosphate
b) Octadecanoic acid
c) Lecithin
d) Glycosphingolipids
e) Ganglioside
30. The following is a storage lipid:
a) Triacylglycerol
b) Cholesteryl esters
c) Cholesterol
d) Phospholipid
e) Galactosyl ceramide
31. In digestion and absorption of lipids:
a) Bile pigments are important biological detergents
b) Hormone-sensitive lipase is secreted by the pancreas
c) Non-specific lipid esterase is the main digestive enzyme
d) Bile salts are important enhancers
e) Phospholipase A2 releases a fatty acid from C2 of TAG

6. 28. The following statement about simple lipids is true:
a) TAG's always contain similar fatty acids
b) Waxes are esters of fatty acids with high molecular weight polyhydric
alcohols
c) Glucosyl ceramide is the main simple lipid in extra-neural tissues
d) Some contain fatty acids with odd carbon number
e) Include only esters of fatty acids with glycerol
29. Complex lipids do not include:
a) Phosphatidyl inositol 4,5 biphosphate
b) Octadecanoic acid
c) Lecithin
d) Glycosphingolipids
e) Ganglioside
30. The following is a storage lipid:
a) Triacylglycerol
b) Cholesteryl esters
c) Cholesterol
d) Phospholipid
e) Galactosyl ceramide
31. In digestion and absorption of lipids:
a) Bile pigments are important biological detergents
b) Hormone-sensitive lipase is secreted by the pancreas
c) Non-specific lipid esterase is the main digestive enzyme
d) Bile salts are important enhancers
e) Phospholipase A2 releases a fatty acid from C2 of TAG