Download Lipids practice problems

Name ____________________________
Chem 21B
Lipids practice problems
1) Define the term lipid and describe the two major classes of lipids.
2) The basic hydrolysis of fats and oils is known as ___________________________.
3) In the formation of a triglyceride, what functional groups chemically combine and what functional group is
formed?
4) How does the presence of a double bond in a fatty acid (or a molecule containing a fatty acyl chain) affect its
physical properties.
5) Arrange the following fatty acids in order of increasing melting point:
stearic acid
linolenic acid 18:3(
linoleic acid
oleic acid
9,12,15)
6) Which of the following terms best describes the compound below?
A) a phosholipid
B) a triglyceride
C) a steroid
D) a prostaglandin
E) a sphingolipid
7) Long chain fatty acids are joined to long chain alcohols by a(n) _________________ linkage to form the class of
compounds known as _____________________.
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8) Provide the structures of the products which result when the following molecule is heated in aqueous solution
of sodium hydroxide:
1-stearoyl, 2-linoleoyl, 3-oleoyl glycerol
9) Draw the structure of the product which results when the following compound is completely hydrogenated
using excess H2 :
1-palmitoyl, 2-linoleoyl, 3-oleoyl glycerol
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10) Draw structures for each of the following:
a) palmitate ion
b) sodium oleate
c) arachadonic acid - 20:4(
5,8,11,14)
d) phosphatidate (2-linoleoyl, 3-stearoyl)
e) phosphatidyl choline (2-lauroyl, 3-myristoyl)
f) cholesterol
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