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15
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Upon hydrolysis, sphingomyelin yields all of the following except:
Fatty acids
Glycerol
Phosphoric acid
Choline
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15
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Which of the following best defines phospholipids?
Lipids containing sulfur
Lipids without fatty acids
Lipids containing phosphorus
Lipids containing nitrogen
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15
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Cephalins are phospholipids that contain either:
Glycerol or cholesterol
Ethanolamine or serine
Tyrosine or tryptophan
Choline or sphingosine
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15
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Which of the following is not a nitrogen base found in phospholipids?
Serine
Ethanolamine
Glycerol
Choline
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15
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Sphingomyelin differs from phosphoglycerides because it:
Contains sphingosine instead of glycerol
Lacks fatty acids
Contains sugar groups
Contains glycerol instead of sphingosine
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15
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Lecithin differs from cephalin mainly in:
Presence of sphingosine
Type of phosphate group
Type of fatty acid
Type of nitrogen base
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the choline obtained from lecithins is considered:
Compound Lipid
Not classified as lipid
Simple Lipid
Derived Lipid
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15
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The most common type of phospholipid in cell membranes is:
Sphingomyelin
Triglyceride
Cholesterol
Phosphatidylcholine (Lecithin)
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15
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In lecithin, the nitrogen compound attached to phosphatidic acid is:
Ethanolamine
Choline
Sphingosine
Serine
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Phospholipids act as good emulsification agents because they are:
Amphipathic (have both polar and nonpolar parts)
Neutral molecules
Fully hydrophilic
Fully hydrophobic
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