Which phospholipid is commonly found in cell membranes?
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Correct answer: Phosphatidylcholine
Phosphatidylcholine is the most abundant phospholipid in most eukaryotic cell membranes, forming a major part of both membrane leaflets. Phosphatidylethanolamine is the second most common; cholesterol is a sterol (not a phospholipid); and triacylglycerol is a storage lipid not found in membranes.
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