객관식
Draw a glycerophospholipid with lauric acid at C1, myristic acid at C2, and choline bonded to phosphate.
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32. Lipids
Phosphoglycerides
객관식
Which one of the following statements accurately describes the difference between cephalins and lecithins?
A
Cephalins contain saturated fatty acids while lecithins have unsaturated fatty acids.
B
Lecithins and cephalins have different backbone molecules.
C
The head groups in cephalins and lecithins are ethanolamine and choline, respectively.
D
Lecithins do not have a head group.
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검증된 단계별 안내1
Begin by understanding the basic structure of phospholipids, which include a glycerol backbone, two fatty acid tails, and a phosphate group attached to a head group.
Recognize that cephalins and lecithins are types of phospholipids, differing primarily in their head groups.
Cephalins have ethanolamine as their head group, while lecithins have choline as their head group. This is a key structural difference between the two.
Both cephalins and lecithins can contain either saturated or unsaturated fatty acids, so the difference in fatty acid saturation is not a distinguishing factor.
Understand that the statement 'Lecithins do not have a head group' is incorrect, as lecithins do have a choline head group, which is essential for their function and classification.
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