What is a nuclear membrane
This is a biology question, not nuclear physics. You will find a definition at
http://www.answers.com/topic/nuclear-envelope
The nuclear membrane, also known as the nuclear envelope, is a double-layered membrane that surrounds the nucleus of a cell. It acts as a barrier, separating the contents of the nucleus from the cytoplasm of the cell. The nuclear membrane consists of two lipid bilayers, an outer membrane, and an inner membrane, which are separated by a space called the perinuclear space.
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