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BioChem 210 Module 5 Exam - Portage Learning
1. Glycerol contains how many carbon atoms?
- 3
- 4
- 5
- 15:
2. Which of the following are derived from or made from fatty acids?
- Cholesterol
- Carotenoids
- Phosphoglycerides
- Both A and B
- Both A and C:
3. Triacylglycerols are made from a ________ and ________.
- glycerol; cholesterol Correct!
- glycerol; three fatty acids
- ceramide; three fatty acids
- ceramide; three cholesterols
- carotenoid; two cholesterols: - 4. PUFA:
5. A ________ is a carboxylic acid that is a structural component of lipids.
- Amino acid
- Carotenoid
- Sphingolipid
- cholesterol
- None of the above: -
6. A particular lipid is a liquid at room temperature, so it is called a(n) ________.
- Oil
- Fat
- Lipid
Membrane
- Sphingolipid: -
7. ________ are a class of membrane proteins that are loosely associated with the membrane bilayer.
- Transmembrane protein
- Integral protein
- Channel protein
- Transport protein
- Peripheral protein:
8. Isoprene units are used to make all of the following except __________.
A. Fatty acids
B. Carotenoid molecules
C. Sphingolipids
D. Both B and C
E. All of the above:
9. Which notation is for a fatty acid with one double bond?
A) 18:1( ” 12) B) 1:18
( C) 1:12
( D) 2:18
( E) 12:1(7,9):
10. Which notation indicates a 14-carbon omega-3 fatty acid that contains no other double bonds?
A) 14:1 ” 11)
( B) 17:1 ” 14)
( C) 14:1 ”3)
( D) 13:1(”11)
E) 14:0( ” 11):
11. __________ is used as the backbone molecule in the formation of storage fats.
- Ceramide
- Glucose
- Sphingolipid
Glycerol
- Phosphoglycerol: -
12. __________ molecules determine blood type in humans.
- Sphingolipids
- Triacylglycerols
- Cholesterol
- Phosphoglycerides
- carotenoid:
13. ________ are found in high concentrations in the membranes of the myelin sheath.
- Fatty acids
- Cholesterol
- Triacylglycerols
- Sphingolipids
- Vitamin K molecules:
14. In a sphingolipid, the fatty acids are attached at carbon-2 by this type of linkage?
Amide linkage
- An ether linkage
- An alcohol linkage
- A peptide linkage
- Alkyl linkage: -
15. Membrane proteins:
- Are sometimes peripheral
- Are sometimes integral
-Are types of lipids
- Both A and B
- None of the above: -
16. Peripheral membrane proteins
- Go all the way through the membrane
- Can be chemically separated from the membrane
- Are firmly attached to the membrane
- Are lipids
None of the above: -
17. Which statement best describes a general feature of membranes?
- The membrane breaks easily
- Individual lipid molecules stay in one place
- The polar heads face inward
- The interior of the lipid bilayer is very polar - The membrane is fluid:
18. Which vitamin is critical for blood coagulation?
- Vitamin A
- Vitamin B
- Vitamin C
- Vitamin D
- Vitamin K: -
19. What molecule is not found in membrane bilayers?
- Phosphoglycerides
Sphingolipid
- Cholesterol
- Integral proteins
- None of these: -
20. What molecule that protects against UV rays is found both in bacteria and in the eyes?
- Phosphoglycerides
- Triacylglycerol
- Cholesterol
- Carotenoid
- Vitamin K: -
21. What molecule has four fused rings in its structure?
- Sphingolipid
- Carotenoid
- Triacylglycerol
- Cholesterol
- Water: -
22. In triacylglycerols, fatty acids are attached to glycerol via
______ linkage.
-O-CO-
-NH-
-O-NH- -COO- -C=C-: -
23. A lipid is __________.
- A fat
- An oil
- A molecule that dissolves in a non-polar solvent
- Is made from isoprene units
- Is water soluble:
24. What is the effect of a double bond on structure of fatty acids?:
25. Where in the body are membranes found?:
26. What type of lipid contains a ceramide? What is the purpose of this lipid?:
27. What is the most significant chemical difference between triacylglycerols and phosphoglycerides that lead to their different functions?:
28. What is the fluid mosaic model and what feature of the cells does it help us understand?:
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