Lipids MCQ Questions and Answers for Practice

1. Based on its structural similarity to other lipids, this lipid most likely functions as

1. an energy storage molecule.
2. a sex hormone.
3. a vitamin required for vision.
4. a membrane component.

2. Which characteristic does this lipid share with a wax?

1. Both contain three fatty acids.
2. Both contain one or more ester bonds.
3. Both contain one or more carboxyl groups.
4. Both contain a polar head.

3. Which characteristic is shared by this lipid and an eicosanoid?

1. This lipid and a thromboxane can both be hydrolyzed in base to produce soaps.
2. This lipid and a prostaglandin can both be hydrolyzed in acid to create fatty acids.
3. This lipid and an arachidonic acid both contain glycerol and hydrocarbon chains.
4. This lipid and a leukotriene are both polyunsaturated molecules.

4. Which component is found in all sphingolipids?

1. a negative charge
2. a phosphate group
3. an amino alcohol
4. a carbohydrate

5. Which is a characteristic of all the fatty acid components in this lipid?

1. They all contain unconjugated cis double bonds.
2. They all are joined to glycerol through an ester bond.
3. They all are hydrophilic because they contain oxygen.
4. They all contain an unbranched carbon chain.

6. Which is a characteristic of biological membranes?

1. Membranes have an asymmetrical micelle structure.
2. Membranes have hydrophobic groups on the surfaces.
3. Membranes contain lipids that polymerize into one large molecule.
4. Membranes contain proteins and amphipathic lipids.

7. Which is a characteristic of sphingolipids?

1. They all contain a long-chain alcohol joined to isoprene.
2. They all contain ceramide joined to a polar group.
3. They all contain a carbohydrate joined to a phosphate group.
4. They all contain a fatty acid joined to glycerol.

8. Which is a characteristic of the lipids in a biological membrane?

1. Lipid molecules are held in fixed positions by non-covalent bonds with proteins.
2. The fluidity of the membrane decreases with lower levels of saturated fatty acids.
3. The fatty acids of lipid molecules are found in the interior of the membrane.
4. Specific glycerophospholipids are distributed equally on the two membrane surfaces.

9. Which is a general property of cell membranes?

1. Membrane proteins have a polar head and a non-polar tail.
2. Membrane lipids are amphipathic.
3. Membranes contain covalent bonds between fatty acids.
4. Membranes contain more lipid than protein.

10. Which is a property of eicosanoids?

1. All eicosanoids contain arachidonic acid and sphingosine.
2. Prostaglandins and leukotrienes both contain a ring structure.
3. Thromboxanes and prostaglandins both contain a carboxyl group.
4. All eicosanoids contain three conjugated double bonds.

11. Which membrane lipid contains an amide bond?

1. phosphatidylserine
2. phosphatidic acid
3. sphingomyelin
4. cholesterol

12. Which of the following is a characteristic of both triacylglycerols and glycerophospholipids?

1. Both contain fatty acids and are saponifiable.
2. Both contain glycerol and ether bonds.
3. Both can be negatively charged at cellular pH.
4. Both contain carboxyl groups and are amphipathic

13. Which of the following is a characteristic of both waxes and terpenes?

1. Both can contain a fatty acid.
2. Both can be non-saponifiable.
3. Both can contain oxygen.
4. Both can contain an amino alcohol.

14. Which of the following molecules is a typical fatty acid?

1. An amphipathic dicarboxylic acid with unconjugated double bonds.
2. A molecule that has one cis double bond in a linear carbon chain.
3. A polar hydrocarbon with that reacts with NaOH to form a salt.
4. A molecule that has an even number of carbon atoms in a branched chain.

15. Which property can be shared by this lipid and a terpene?

1. Both can form micelles.
2. Both can contain a saturated fatty acid.
3. Both can be very hydrophobic molecules.
4. Both can contain isoprene.