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19 Cards in this Set
- Front
- Back
- 3rd side (hint)
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Which of the following statements concerning fatty acids is correct?
A) One is the precursor of prostaglandins. B) Phosphatidic acid is a common one. C) They all contain one or more double bonds. D) They are a constituent of sterols. E) They are strongly hydrophilic. |
A
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Which of the following molecules or substances contain, or are derived from, fatty acids?
A) Beeswax B) Prostaglandins C) Sphingolipids D) Triacylglycerols E) All of the above contain or are derived from fatty acids. |
E
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Biological waxes are all:
A) trimesters of glycerol and palmitic acid. B) esters of single fatty acids with long-chain alcohols. C) trimesters of glycerol and three long chain saturated fatty acids. D) sphingolipids. E) none of the above. |
B
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Which of the following statements is true of lipids?
A) Many contain fatty acids in ester or amide linkage. B) Most are simply polymers of isoprene. C) Testosterone is an important sphingolipid found in myelin. D) They are more soluble in water than in chloroform. E) They play only passive roles as energy-storage molecules. |
B
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Which of the following contains an ether-linked alkyl group?
A) Cerebrosides B) Gangliosides C) Phosphatidyl serine D) Platelet-activating factor E) Sphingomyelin |
D
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Sphingosine is not a component of:
A) cardiolipin. B) ceramide. C) cerebrosides. D) gangliosides. E) sphingomyelin. |
A
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Which of the following statements about membrane lipids is true?
A) Glycerophospholipids are found only in the membranes of plant cells. B) Glycerophospholipids contain fatty acids linked to glycerol through amide bonds. C) Lecithin (phosphatidylcholine), which is used as an emulsifier in margarine and chocolate, is a sphingolipid. D) Some sphingolipids include oligosaccharides in their structure. E) Triacylglycerols are the principal components of erythrocyte membranes. |
D
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Which of the following is true of sphingolipids?
A) Cerebrosides and gangliosides are sphingolipids. B) Phosphatidylcholine is a typical sphingolipid. C) They always contain glycerol and fatty acids. D) They contain two esterified fatty acids. E) They may be charged, but are never amphipathic. |
A
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A compound containing N-acetylneuraminic acid (sialic acid) is:
A) cardiolipin. B) ganglioside GM2. C) phosphatidylcholine. D) platelet-activating factor. E) sphingomyelin. |
B
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Fatty acids are a component of:
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A) carotenes.
B) cerebrosides. C) sterols. D) vitamin D. E) vitamin K. |
B
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Which of the following statements about sterols is true?
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A) All sterols share a fused-ring structure with four rings.
B) Sterols are found in the membranes of all living cells. C) Sterols are soluble in water, but less so in organic solvents such as chloroform. D) Stigmasterol is the principal sterol in fungi. E) The principal sterol of animal cells is ergosterol. |
A
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Which of the following is not true of sterols?
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A) Cholesterol is a sterol that is commonly found in mammals.
B) They are commonly found in bacterial membranes. C) They are more common in plasma membranes than in intracellular membranes (mitochondria, lysosomes, etc.). D) They are precursors of steroid hormones. E) They have a structure that includes four fused rings. |
B
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Which of the following best describes the cholesterol molecule?
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A) Amphipathic
B) Nonpolar, charged C) Nonpolar, uncharged D) Polar, charged E) Polar, uncharged |
A
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Tay-Sachs disease is the result of a genetic defect in the metabolism of:
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A) gangliosides.
B) phosphatidyl ethanolamine. C) sterols. D) triacylglycerols. E) vitamin D. |
A
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An example of a glycerophospholipid that is involved in cell signaling is:
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A) arachidonic acid.
B) ceramide. C) phosphatidylinositol. D) testosterone. E) vitamin A (retinol). |
C
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Non-steroidal anti-inflammatory drugs (NSAIDS) like aspirin and ibuprofen act by blocking production of:
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A) biological waxes
B) prostaglandins C) sphingolipids D) vitamin D E) none of the above |
B
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Which of the following is not a fat-soluble vitamin?
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A) A
B) C C) D D) E E) K |
B
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Which vitamin is derived from cholesterol?
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A) A
B) B12 C) D D) E E) K |
C
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Identify the molecule(s) derived from sterols.
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A) Arachidonic acid
B) Gangliosides C) Phosphatidylglycerol D) Prostaglandins E) Vitamin D |
E
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