Which of the Following Statements is Correct About Diffusion

Question

Which of the following statements is correct about diffusion?
A)It is very rapid over long distances.
B)It requires an expenditure of energy by the cell.
C)It is a passive process in which molecules move from a region of higher concentration to a region of lower concentration.
D)It is an active process in which molecules move from a region of lower concentration to one of higher concentration.
E)It requires integral proteins in the cell membrane.

Accepted Answer

Diffusion is a passive process in which particles move from an area of higher concentration to an area of lower concentration. It does not require the cell to expend energy. Option A is incorrect because while diffusion is rapid over short distances, it becomes slower as the distance increases. Option B is incorrect because diffusion is passive and does not require energy. Option D is incorrect because it describes active transport, not diffusion. Option E is incorrect because not all types of diffusion require integral proteins in the cell membrane.