Multiple Choice
Which one of the following statements accurately describes the difference between cephalins and lecithins?
23. Lipids
Glycerophospholipids
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Draw a lecithin with palmitic acid at C1 and palmitoleic acid at C2.
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Verified step by step guidance1
Identify the structure of lecithin, which is a type of phospholipid. Lecithin typically consists of a glycerol backbone, two fatty acid chains, a phosphate group, and a choline group.
Recognize that palmitic acid is a saturated fatty acid with the chemical formula C16H32O2. It should be attached to the first carbon (C1) of the glycerol backbone.
Identify palmitoleic acid as a monounsaturated fatty acid with the chemical formula C16H30O2. It has one double bond and should be attached to the second carbon (C2) of the glycerol backbone.
Ensure that the phosphate group is attached to the third carbon (C3) of the glycerol backbone, and the choline group is linked to the phosphate group.
Draw the complete structure by placing palmitic acid at C1, palmitoleic acid at C2, and the phosphocholine group at C3 of the glycerol backbone, ensuring the correct placement of the double bond in palmitoleic acid.
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