Question

Which characteristic of a cell membrane allows it to control materials entering and leaving a cell?
A A cell membrane is surrounded by fluid.
B A cell membrane is semipermeable.
C A cell membrane holds organelles in place.
D A cell membrane is found in plant and animal cells.

Answer 1

The characteristic of a cell membrane that allows it to control materials entering and leaving a cell is:

**B A cell membrane is semipermeable.**

This means that the cell membrane allows certain substances to pass through while blocking others, thereby regulating what enters and exits the cell.