Which of the Following Most Accurately Describes Selective Permeability

Question

Which of the following most accurately describes selective permeability?
A)An input of energy is required for transport across the membrane.
B)Charged molecules pass through a membrane.
C)There must be a concentration gradient for molecules to pass through a membrane.
D)Only certain molecules are able to cross a cell membrane.
E)Amphipathic molecules pass through a membrane.

Accepted Answer

Selective permeability refers to the property of cell membranes to allow only certain molecules to cross the membrane, while restricting others. This is due to the presence of specific transport proteins and lipid bilayer properties that regulate the movement of molecules. Therefore, only certain molecules are able to cross a cell membrane.