The surface of the nucleus is bounded by two phospholipid bilayer membranes collectively called the nuclear envelope.
The fundamental structure of the membrane is the phospholipid bilayer ,which forms a stable barrier , between two aqueous compartment. In the case of the plasma membrane ,these compartment are the inside and the outside of the cell.
The boundary of the nucleus is called nuclear envelope . It consists of two phospholipid bilayers an outer membrane and inner membrane .
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