Question

The statements given below are incorrect. Rewrite the correct statement by changing the underlined words of the statements.

Free movement of solutes in and out of the cell takes place across the cell membrane.

Answer 1

Cell membrane

1. The cell membrane is a selectively permeable membrane that allows only certain molecules to pass through.
2. It is the outermost covering of animal cells. It is a semi-permeable membrane composed of lipids and proteins.
3. The cell wall is the outermost covering of plant cells. It is present outside the cell membrane and is tough, flexible, and sometimes rigid in its texture.
4. It is mainly composed of cellulose, long fibers of carbohydrates including hemicellulose, lignin, and pectin.

Final answer: Free movement of solutes in and out of the cell takes place across the cell wall.