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808 Chapter 25
Copyright © 2017 Pearson Education, Inc.
Chapter 25 Practice Test
1.
Mark off the isoprene units in squalene.
squalene
2.
Draw the mechanism for the following reaction:
O
PP
i
O
PP
i
PP
i
HB
+
+
2
(PP
i
=
pyrophosphate)
3.
Draw structures of the following:
a.
a phospholipid that contains ethanolamine
b.
a wax
4.
Indicate whether each of the following statements is true or false:
a.
Cholesterol is the precursor of all other steroids.
T F
b.
The double bonds in unsaturated fats are conjugated.
T F
c.
Fats have a higher percentage of saturated fatty acids than do oils.
T F
d.
A saturated fatty acid has a lower melting point than an unsaturated fatty acid
with the same number of carbons.
T F
e.
Lipids are insoluble in water.
T F
f.
A diterpene contains 20 carbons.
T F
g.
Vitamin A is not a coenzyme.
T F
5.
How many carbon atoms are in a triterpene?
6.
What size is the ring in a prostaglandin?
7.
What is the starting material for the synthesis of prostaglandins?