Question

Which is the correct statement regarding a cell membrane?

• A. It is permeable only during a certain stage of the cell cycle.
• B. It only allows certain molecules to pass through it.
• C. It only allows polar solvents like water to pass through it.
• D. It allows no molecule to pass through it.

Answer 1

The correct option is B

It only allows certain molecules to pass through it.

A membrane that surrounds the cell is commonly known as the cell membrane. It allows only certain molecules or ions to pass through it. Therefore, it is called a selectively permeable membrane. The cell membrane can also block the passage of certain substances depending on the conditions inside or outside of the cell.