Which of the Following Statements Is Correct About Passive Diffusion

question 9

Multiple Choice

Which of the following statements is correct about passive diffusion?

• A) 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).
• B) It may require a transport protein.
• 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 requires an expenditure of energy by the cell.
• E) It involves movement of molecules down a concentration gradient and may require a transport protein.

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