1. Glycerol contains how many alcohol
functional groups?
1. 1
2. 2
3. 3
4. 4
5. None of the above
2. Which of the following are derived from or
made from fatty acids?
A. Cholesterol
B. Carotenoids
C. Phosphoglycerides
D. Both A and B
E. Both A and C
3. Triacylglycerols are made from:
A. A glycerol backbone
B. Three fatty acids
C. Amide linkages between fatty acids
D. A glycerol backbone and three fatty acids
E. All of the above
Correct Answer: D. A glycerol backbone and
three fatty acids
4. Saturated
oB
5. A ________ is a carboxylic acid that is a
structural component of lipids.
A. Amino acid
B. Carotenoid
C. Sphingolipid
D. Cholesterol
E. None of the above
Correct Answer: E. None of the above
6. A particular lipid is a liquid at room
temperature, so it is called a(n) ________.
A. Oil
B. Fat
C. Lipid Membrane
D. Sphingolipid
Correct Answer: A. Oil
7. Identify the lipid class given by the
structural formula:
A. Phosphoglyceride
B. Sphingolipid
C. Cholesterol
D. Triacylglycerol
E. None of these
Correct Answer: A. Phosphoglyceride
8. ________ are a class of membrane proteins
that are firmly associated with the
membrane bilayer.
A. Peripheral protein
B. Integral protein
C. Channel protein
D. Transport protein
E. Inner transmembrane protein
9. Isoprene units are used to make
A. Cholesterol
B. Carotenoid molecules
C. Vitamin K
D. Both A and C
E. All of the above
10. Which notation is for a fatty acid with two
double bonds?
A 18:1(ΔΔ9,13)
B. 18:2(Δ9,13)
C. 14:1(Δ9,13)
D. 2:18(Δ9,13)
E. 14:1:2(Δ9,13)
11. Which notation indicates a 20-carbon
omega-3 fatty acid that contains no other
double bonds?
A. 20:1 (Δ11)
B. 20:1Δ18)
C. 20:1(Δ17)
D. 20:1(Δ3)
E. 20:3(Δ3omega)
12. __________ is used as the backbone
molecule in the formation of storage fats.
A. Ceramide
B. Glucose
C. Sphingolipid
D. Glycerol
E. Phosphoglycerol
13. Which types of membrane lipids determine
the blood type of humans?
A. Triacylglycerols
B. Phosphoglycerides
C. Cholesterol
D. Fatty acids
E. Sphingolipids
14. Sphingolipids are found in high
concentrations in the membranes of
__________.
A. Organelles
B. Myelin sheaths
C. All cells
D. Heart cells
E. Vitamin K lipids
Correct Answer: B. Myelin sheaths
15. In a sphingolipid, the fatty acids are attached
at carbon-2 by this type of linkage?
A. Amide linkage
B. An ether linkage
C. An alcohol linkage
D. A peptide linkage
E. Alkyl linkage
16. Membrane proteins:
Are sometimes peripheral
B. Are sometimes integral
C. Assist in the transport of molecules
D. Can get nutrients in and the waste molecule
out of the cell
E. All are correct
17. Peripheral membrane proteins
A. Go all the way through the membrane and
are firmly attached to the membrane
B. Are firmly attached to the membrane
C. Are lipids that can be either on the top of
the cell or bottom of the cell
D. Are associated with the inside or outside
surface of the membrane
E. None of the above
18. Which statement best describes a general
feature of membranes?
A. Individual lipid molecules are free to
move in the membrane
B. The interior of the lipid bilayer is very
polar
C. The membrane breaks easily
D. The polar heads face inward
E. The membrane is rigid
19. The following cartoon drawing represents
which lipid type?
A. Fatty Acid
B. Triacylglycerol
C. Phosphoglyceride
D. Cholesterol
E. None of these
20. Which vitamin is critical for blood
coagulation?
A. Vitamin A
B. Vitamin B
C. Vitamin C
D. Vitamin D
E. Vitamin K
21. __________ is not found in membrane
bilayers.
A. Cholesterol
B. Sphingolipid
C. Triacylglycerol
D. Phosphoglycerides
E. All of these
Correct Answer: C. Triacylglycerol
22. What molecule that protects against UV rays
is found both in bacteria and in the eyes?
A. Sphingolipids
B. Carotenoid
C. Triacylglycerol
D. Cholesterol
E. Water
23. What molecule has four fused rings in its
structure?
A. Sphingolipid
B. Carotenoid
C. Triacylglycerol
D. Cholesterol
E. Water
24. In triacylglycerols, fatty acids are attached to
glycerol via a/an______ linkage.
A. -O-CO-
B. -NH-
C. -O-NH-
D. -COO-
E. -O-CO-
Correct Answer: A. -O-CO-
25. A lipid is __________.
A. A. A fat
B. An oil
C. A molecule that dissolves in a non-polar
solvent
D. Is made from isoprene units
E. Is water soluble
Correct Answer: C. A molecule that
dissolves in a non-polar solvent
A particular fatty acid molecule has two bends, or kinks,
in its structure. What is the cause of the bending or
kinking?
Answer: Double bonds cause the fatty acids to bend or kink
about in solution. These double bonds reduce the packing
structure of fatty acids, making them more liquid-like.
Where in the cell are membranes found?
Answer: They make up the cell. The cell itself and the
organelles have membranes.
(Short Answer)
What type of lipid contains a ceramide? What is the
purpose of this lipid?
Answer: Sphingolipids. Sphingolipids are structural lipids
that form membrane bilayers with specific functions.
Sphingomyelins are a subtype of sphingolipids that occur in
all membrane bilayers but are especially prominent in the
myelin sheath of some neurons. This subclass of
sphingolipids typically has a polar head group with a neutral
charge. Another vital function of sphingolipids is that they
define the blood type of individuals.
What is the most significant chemical difference between
triacylglycerols and phosphoglycerides that lead to their
