Question

Why the plasma membrane must be a bilayer?

Answer 1

Plasma membrane:

1. It is the outermost layer in animal cells and a layer beneath the cell wall in plant cells.
2. It provides shape to the cell and protects the cell from the external environment.
3. It is composed of proteins and lipids.
4. It is a selectively permeable membrane that allows the entry of certain substances through it.

Plasma membrane must be bilayered because:

1. It helps with the communication and transfer of signals between the cells.
2. It serves as a selective barrier between the external and internal environment of the cell.
3. It plays a vital role in guarding the cell from invading pathogens.
4. It also plays an important role in controlling the entry and exit of substances in the cell.