Simple diffusion of molecules occurs
A) from an area of lesser concentration to an area of greater concentration.
B) in nonliving systems as well as living systems.
C) across plasma membranes only through transport proteins.
D) until those molecules are more highly concentrated on one side of the plasma membrane.
E) only in molecules that are in a gaseous state.

Question

Quizplus · Accepted Answer

Simple diffusion occurs in both nonliving and living systems, as it is a fundamental process driven by the random movement of molecules from areas of higher concentration to areas of lower concentration, not requiring any biological machinery or specific state of matter.

Simple Diffusion of Molecules Occurs