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.

Question

Quizplus · Accepted Answer

Diffusion is a passive process in which molecules move from a region of higher concentration to a region of lower concentration, without the need for energy expenditure by the cell. Option A is incorrect because diffusion occurs over short distances. Option B is incorrect because diffusion is a passive process that does not require energy expenditure. Option D is incorrect because it describes active transport, which is the movement of molecules against their concentration gradient and requires energy expenditure. Option E is incorrect because integral proteins are only required for facilitated diffusion, which is a specific type of passive transport.

Which of the Following Statements Is Correct About Diffusion