Multiple choice

Which one of these membrane constituents are found in the inner leaflet of animal cell membrane?

  1. Phosphatidylcholine

  2. Phophatidylserine

  3. Sphingomyeline

  4. Cholesterol
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Among the phospholipids of plasma membrane, phosphatidylcholine, sphingomyelin, phospatidylserine and phosphoethanolamine are distributed asymmetrically along the plasma membrane. Phosphatidylcholine and sphingomyeline are found in the outer leaflet of plasma membrane whereas phosphatidylserine and phosphoethanolamine are found in inner leaflet. Cholesterol is distributed in both leaflets.

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