Multiple choice

What part of the cell works as a fence, controlling what enters and exits a cell?

  1. Nucleus

  2. Membrane

  3. Mitochondria

  4. Lysosome

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The cell membrane is a selectively permeable barrier that regulates the movement of substances in and out of the cell. This helps maintain a stable internal environment, unlike the nucleus which controls genetic activity.