Selective permeability of the membrane is primarily determined by
A)membrane phospholipids
B)how much cholesterol is present
C)the number and type of membrane proteins
D)the charge of the membrane
E)none of these

Question

Quizplus · Accepted Answer

The number and type of membrane proteins play a crucial role in determining the selectivity of the membrane. Some membrane proteins act as channels or transporters, allowing only specific molecules to cross the membrane, while others may act as receptors or enzymes, controlling cellular responses. While membrane phospholipids and cholesterol do contribute to the overall structure and properties of the membrane, they are not primarily responsible for its selective permeability. The charge of the membrane is also a factor in selectivity, but this is largely determined by the charged amino acids in the membrane proteins.

Selective Permeability of the Membrane Is Primarily Determined by