Biochemistry 2 - Lipids
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A quiz for the SBI4U Biochemistry Unit.
- 1.The basic backbone of most fat or oil molecules is an alcohol called....
- A.
Glycerol
- B.
Glycerin
- C.
Glyceric acid
- D.
Glycogen
- 2.Which of these statements best describes the composition of Lipids?
- A.
C, H, O in a 1:2:1 Ratio
- B.
C, H, O, N, P all present
- C.
C, H, O in no specific ratio
- D.
C, H, O, S
- 3.Which of the following functional groups would be found in typical lipids?
- A.
Carboxyl -COOH (O=C-O-H)
- B.
Hydroxyl -OH
- C.
Carbonyl -C=O
- D.
All of these are possible
- 4.
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The image below shows a molecule of Octanoic Acid. Which type of molecule is it?- A.
An alcohol
- B.
An unsaturated fatty acid
- C.
A saturated fatty acid
- 5.
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Which of the following would be true of this molecule?- A.
It is a triglyceride fat
- B.
It is most likely liquid at room temperature
- C.
It is most likely a solid at room temperature
- D.
Only a & b
- E.
Only a & c
- 6.
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Which of these statements best describes these molecules?- A.
They are both fatty acids.
- B.
They are both saturated fatty acids.
- C.
The top one is an unsaturated fatty acid; the lower one is saturated.
- D.
The top one is a saturated fatty acid; the lower one is polyunsaturated.
- E.
They are both unsaturated fatty acids.
- 7.Which of these is NOT a typical role for lipids in a living organism?
- A.
Provide stored energy reserves
- B.
Form a structural component of cell membranes & many tissues
- C.
A source of glucose, when broken down
- D.
A material from which hormones can be produced
- E.
Protection of internal organs, insulation beneath skin
- 8.
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This is a molecule of Linoleic acid. Which statement best describes it?- A.
It is an unsaturated fatty acid.
- B.
It is a saturated fatty acid.
- C.
It is a triglyceride fat.
- D.
It is a sterol.
- 9.
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Which molecule is shown below?- A.
Triglyceride
- B.
Fatty acid
- C.
Cholesterol
- D.
Glycerol
- 10.
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Examine the diagram below, showing a phospholipid. The areas labelled A, B, C, D are (in order...)...- A.
Protein, phosphate, carbohydrate, lipid
- B.
Phosphate, glycerol, carbohydrate, fatty acids
- C.
Amino acid residue, phosphate group, glycerol, fatty acids
- D.
Fatty acids, phosphate, carbohydrate, hydrocarbon
- E.
Amino acid residue, fatty acid, glycerol, phosphate
- 11.The main role of phospholipids in living cells is to...
- A.
Store energy for future nutritional leads
- B.
Make the cell wall in plant cells
- C.
Make insect exoskeletons
- D.
Form cell membranes in all eukaryotic cells
- E.
Form the basis of many hormones
- 12.
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Examine the image of a phospholipid, below. Note that some areas are labelled hydrophobic, and others are hydrophilic. What is the term we use for molecules, like this one, that have both properties?- A.
Hydrogenous
- B.
Ambivalent
- C.
Amphoteric
- D.
Ambidextrous
- E.
Antipasto
- 13.In an aqueous environment, phospholipids will form which of the following?
- A.
Micelles
- B.
Liposomes
- C.
Bilayers
- D.
All of the above
- E.
Only a & c
- 14.Which of the following common materials behaves as an amphoteric molecule?
- A.
Olive oil
- B.
Detergent
- C.
Lard
- 15.The first cells likely developed from spontaneous associations of phospholipids, called....?
- A.
Liposomes
- B.
Micelles
- C.
Macrophages
- D.
Lipoproteins
- E.
Microlipids
- 16.All plant lipids are liquids, or oils.
- A.
True
- B.
False
- 17.Lipids and carbohydrates have virtually the same composition.
- A.
True
- B.
False
- 18.When lipids are being digested, the cell uses up one water molecule.
- A.
True
- B.
False
- 19.Which of the following best describes the formation of lipids?
- A.
Isomerization
- B.
Polymerization
- C.
Dehydration synthesis
- D.
Ammonification
- 20.The breakdown of lipids involves the breaking of a bond using water. This is a process called...?
- A.
Hydration
- B.
Dehydration
- C.
Hydrophobia
- D.
Hydrophilia
- E.
Hydrolysis
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