RRB RPF RPSF SI and CONS Model Papers 10 with solutions

(2) The cell membrane (plasma membrane) is a thin semi-permeable membrane that surrounds the cytoplasm of a cell.
Its function is to protect the integrity of the interior of the cell by allowing certain substances into the cell, while keeping other substances out. It also serves as a base of attachment for the cytoskeleton in some organisms and the cell wall in others.