1. Number of milligrams of KOH required to neutralize fatty acid present in 1 g of fat is called
a) Potassium number
b) Acid number
c) Saponification number
d) Iodine number
2. For the determination of fatty acid composition, transesterification is done in a warm aqueous solution of
3. Fat storing cells of vertebrates are called
4. Examples of monounsaturated fatty acids are:
a) Oleic acid
b) Arachidonic acid
c) Palmitic acid
d) Linolenic acid
5. _____ Which characteristic is shared by this lipid and an eicosanoid?
a) This lipid and a leukotriene are both polyunsaturated molecules.
b) This lipid and a thromboxane can both be hydrolyzed in base to produce soaps.
c) This lipid and a prostaglandin can both be hydrolyzed in acid to create fatty acids.
d) This lipid and an arachidonic acid both contain glycerol and hydrocarbon chains.
6. _____ Which property can be shared by this lipid and a terpene?
a) Both can contain isoprene.
b) Both can form micelles.
c) Both can contain a saturated fatty acid.
d) Both can be very hydrophobic molecules.
7. _____ Based on its structural similarity to other lipids, this lipid most likely functions as
a) a membrane component.
b) an energy storage molecule.
c) a sex hormone.
d) a vitamin required for vision.
8. _____ Which is a characteristic of biological membranes?
a) Membranes contain proteins and amphipathic lipids.
b) Membranes have an asymmetrical micelle structure.
c) Membranes have hydrophobic groups on the surfaces.
d) Membranes contain lipids that polymerize into one large molecule.
9. _____ Which membrane lipid contains an amide bond?
c) phosphatidic acid
10. _____ Which type of membrane lipid contains an acidic oligosaccharide?
11. _____ Which would be a property of all the major types of lipids in this membrane?
a) They would be saponifiable in base and hydrolyzed in acid.
b) They would have polar heads and non-polar tails.
c) They would be composed of five-carbon units.
d) They would be joined to each other through covalent bonds.
12. _____ Which is a characteristic of the lipids in a biological membrane?
a) Specific glycerophospholipids are distributed equally on the two membrane surfaces.
b) Lipid molecules are held in fixed positions by non-covalent bonds with proteins.
c) The fluidity of the membrane decreases with lower levels of saturated fatty acids.
d) The fatty acids of lipid molecules are found in the interior of the membrane.
13. _____ Which is a property of integral membrane proteins?
a) All integral membrane proteins contain hydrophilic regions.
b) All integral membrane proteins span the entire membrane.
c) All integral membrane proteins contain carbohydrate groups within the membrane.
d) All integral membrane proteins transport non-polar molecules through the membrane.
14. _____ Which property is shared by integral membrane proteins and peripheral membrane proteins?
a) Both can contain an unusually high proportion of hydrophobic R-groups.
b) Both can contain regions of α-helices and β-pleated sheets.
c) Both can flip between the two sides of the membrane.
d) Both can form hydrogen bonds with the hydrocarbons of lipids.
15. _____ which characteristic is most likely shared by a cell membrane and a lipoprotein particle?
a) Both are composed of a lipid bilayer.
b) Both contain a high amount of triacylglycerols.
c) Both contain hydroxyl groups on the surface.
d) Both contain proteins in the interior.