Question

Explain plasma membrane in detail plz urgent?????

Answer 1

plasma membrane is the outermost covering of the cell .it seperates cell contents from outer environment .plasma membrane is made up of lipids(60%)proteins(39-40%)and carbohydrates(1-5%)
it controls the movement of different substences by various processes.

Answer 2

The biological membrane, which is present in both eukaryotic and prokaryotic cell. It is also called as cell membrane as it is works as a barrier between the inner and outer surface of a cell. In animal cells, the plasma membrane is present in the outer most layer of the cell and in plant cell it is present just beneath the cell wall.

Function of Plasma Membrane

It separates the contents of the cell from its outside environment and it regulates what enters and exits the cell.
Plasma membrane plays a vital role in protecting the integrity of the interior of the cell by allowing only selected substances into the cell and keeping other substances out.
It also serves as a base of attachment for the cytoskeleton in some organisms and the cell wall in others. Thus the cell membrane supports the cell and helps in maintaining the shape of the cell.
The cell membrane is primarily composed of proteins and lipids. While lipids help to give membranes their flexibility and proteins monitor and maintain the cell's chemical climate and assist in the transfer of molecules across the membrane.
The lipid bilayer is semi-permeable, which allows only selected molecules to diffuse across the membrane.