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