Fluid Mosaic Model & Cell Functions — NEET Biology
📚 Practice ConceptThe fluid nature of the membrane is also important from the point of view of functions like cell growth, formation of intercellular junctions, secretion, endocytosis, cell division etc.
Which of the following statements regarding the plasma membrane and associated processes are correct? S1: The fluid nature of the plasma membrane allows for lateral movement of proteins within the lipid bilayer, contributing to its functionality in endocytosis. S2: In prokaryotic cells, the absence of a flexible plasma membrane, coupled with a rigid cell wall, prevents the process of endocytosis. S3: The plasma membrane of human erythrocytes comprises approximately 52% protein and 40% lipid. S4: Active transport across the plasma membrane involves the movement of molecules along their concentration gradient and does not require ATP utilization. S5: Peripheral proteins are embedded partially or totally in the lipid bilayer, whereas integral proteins lie on the surface of the membrane.
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