In this term paper we will discuss about how molecules are transported through membranes. All cells are bounded by a delicate plasma membrane. Moreover, most organelles in the cytoplasm of eukaryotic cells are membrane bound. Besides holding in the contents of the cell or organelle, these membranes play other vital roles in the life of the cell. They control internal [...]
What is the structure and function of cell membrane? The outer limiting membrane present in most animal cells is plasmamembrane, plasmalemma or cell membrane. It lies between the cell wall and the cytoplasm in plant cells.
The difference between Plasma Membrane and Nuclear Membrane are Plasma Membrane is a continuous membrane without having any pore and surrounds the protoplasm whereas Nuclear Membrane is a discontinuous membrane with complex pores and surrounds the nucleus.
The living outer boundary of cytoplasm of a cell is the plasma membrane. Though a number of models have been proposed to explain the ultra-structure of plasma membrane, the fluid mosaic model proposed by Singer and Nicolson (1974) is widely accepted.