Multiple Choice
Phosphatidate is a glycerophospholipid formed from:
a) Glycerol-3-phosphate and two fatty acid chains.
b) Glycerol-3-phosphate and two free fatty acids.
c) Glycerol and two fatty acid chains.
d) Pyruvate and triacylglycerol.
10. Lipids
Glycerophospholipids
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A certain glycerophospholipid is made of glycerol, two fatty acids, and ethanolamine. What components does the carboxylic ester linkage connect?
a) Phosphate and ethanolamine.
b) Glycerol and fatty acids.
c) Fatty acids and phosphate.
d) Glycerol and ethanolamine.
e) There are no ester linkages is the glycerophospholipid.
A
Phosphate and ethanolamine.
B
Glycerol and fatty acids.
C
Fatty acids and phosphate.
D
Glycerol and ethanolamine.
E
There are no ester linkages is the glycerophospholipid.
Verified step by step guidance1
Understand the structure of a glycerophospholipid: It consists of a glycerol backbone, two fatty acids, a phosphate group, and an alcohol group such as ethanolamine.
Identify the ester linkage: In glycerophospholipids, ester linkages are formed between the hydroxyl groups of glycerol and the carboxyl groups of fatty acids.
Recognize the role of glycerol: Glycerol has three hydroxyl groups, two of which form ester bonds with the carboxyl groups of the fatty acids.
Clarify the connection: The ester linkage specifically connects the glycerol backbone to the fatty acids, forming the hydrophobic tail of the glycerophospholipid.
Conclude the correct answer: Based on the structure, the carboxylic ester linkage connects glycerol and fatty acids.
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Glycerophospholipids practice set
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