Which of the Following Statements Is Correct About Passive Diffusion

question 14

Multiple Choice

Which of the following statements is correct about passive diffusion?

• A)It requires an expenditure of energy by the cell.
• B)It is a process in which molecules move from a region of higher concentration to a region of lower concentration (or down a concentration gradient).
• C)It is a process in which molecules move from a region of lower concentration to one of higher concentration (or up a concentration gradient).
• D)It may require a transport protein.
• E)It involves movement of molecules down a concentration gradient and may require a transport protein.