Practice question
Question
The lipid composition of the two monolayers of the plasma membrane is quite different. This lipid asymmetry is functionally relevant, especially in converting extracellular signals into intracellular ones. Given below are a few membrane lipids: A. Phosphatidylserine B. Phosphatidylinositol 4-phosphate C. Phosphatidylcholine D. Sphingomyelin Choose the option that correctly defines all the lipids involved in signaling and are restricted to the cytosolic face of the plasma membrane.
Explanation
Analysis of the lipid composition of the two monolayers shows A and B represents established outcome. functional assays supports option B, whereas distractors confuse substrate or regulatory direction and fail to reproduce observed results.
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