Question

I am like a guard. I do not allow everything to get in and out of the cell. Who am i ?

Answer 1

i am like a guard. I do not allow everything to get in and out of the cell. i am cell membrane

Answer 2

You are semi permeable membrane.

Cell membranes are semipermeable membrane. semipermeable membrane allows only specific I want to get inside and outside of the cell.

this occurs through facilitated diffusion,passive transport and active transport.

these membranes are made up of phospholipids. semipermeable membrane plays an important role in the survival of the cell.

transport of ions like sodium,calcium,potassium etc are moved through
a semipermeable membrane which are important for biological life processes.

hope this helps!