Question

Which statement about the cell membrane is true?

It contains cellulose and sugars that are involved in communication.
It is present in animal cells only.
It is rigid and elastic for supporting the cell’s shape.
It prevents harmful substances from entering a cell.

Answer 1

The answer is D, It prevents harmful substances from entering the cell. Hope this helps!

Answer 2

It prevents harmful substances from entering a cell. I uses carrier proteins to do so.