Multiple choice Which of the following statements is incorrect? Plasma membrane is the outermost covering of a plant cell. Plasma membrane allows only selected materials to move in and out of the cell. Plasma membrane is living. The movement of water across the plasma membrane is called osmosis. The plasma membrane is flexible. Reveal answer Fill a bubble to check yourself A Correct answer Explanation This statement is incorrect. Thus, it is the correct answer. Plasma membrane is the outermost covering of an animal cell. Cell wall is the outermost covering of a plant cell.