CHM :sample question
Which of the following describes the compound below?
CH3(CH)7CH=CH(CH2)7COOH
a. triglyceride
b. micelle
c. unsaturated fatty acid
d. saturated fatty acid
Question 2
Saponification will result in what products?
a. 3 fatty acids + glycerol
b. sodium salts of 3 fatty acids + glycerol
c. cholesterol + 3 fatty acids
d. cholesterol + sodium salts of 3 fatty acids
Question 3
Which of the following statements correctly describe(s) the relationship between the structure of a fatty acid and its melting point?
a. Saturated fatty acids have melting points that increase gradually with molecular weight.
b. Presence of a trans double bond has greater effect on melting point than a cis double bond.
c. As the number of double bonds in a fatty acid increases, the melting point decreases.
d. A and C
Question 4
Which of the following terms best describes the interior of a soap micelle in water?
a. hydrophobic
b. hard
c. hydrophiic
d. saponified
Question 5
Which of the following correctly describe(s) glyceryl trimyristate?
a. an ester
b. a triglyceride
c. a fat
d. all of the above
Question 6
A lipid bilayer is composed of what class of molecules?
a. cholesterol esters
b.triglycerides
c.phospholipids
d. steroids
Question 7
Most of the principal sex hormones in humans are
a. terpenes
b. prostaglandins
c. phospholipids
d. steroids
Question 8
Which reagent would be used to distinguish CH3(CH2)10COOH from CH3(CH2)4CH=CH(CH2)4COOH?
a.NaOH/H2
b.Ag(NH3)2
c.Br2/CCl4
d. H2Cr2O7
Question 9
What structural features of phospholipids contribute to the formation of a lipid bilayer?
a. non-polar hydrophilic head
b. non-polar hydrophobic carbon tail
c.ionized carboxylate groups
d. carbon chain with multiple hydroxyl groups
Question 10
What is the product of complete hydrogenation of linolenic acid?
a. linoleic acid
b. palmitic acid
c. stearic acid
d. arachidonic acid