Concept:Cell membrane in eukaryotes follows fluid mosaic model with phospholipid bilayer and proteins.
Key Fact:Human RBC membrane has about
52% protein.
Phospholipids form a bilayer with hydrophobic tails facing inward, away from water.
Mesosomes are prokaryotic structures, not eukaryotic.
Glycocalyx is a prokaryotic feature, not present on eukaryotic plasma membrane outer surface.
Explanation:Statement A: Membrane of human RBCs has approximately
52% protein — true, as RBC membrane contains high protein content.
Statement B: Major phospholipids arranged in bilayer — true, this is the fundamental arrangement of membrane lipids.
Statement C: Extensions of plasma membrane forming mesosomes — false, mesosomes occur in prokaryotes, not in eukaryotes.
Statement D: Tails (hydrophobic) face inner part, protected from aqueous medium — true, this is correct for the lipid bilayer.
Statement E: Glycocalyx present on outer surface of plasma membrane — false, glycocalyx is found in prokaryotes; eukaryotic cells typically lack glycocalyx on outer surface.
Hence only statements A, B, and D are correct.
Answer:C. A, B and D only
