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Nuclear membrane



The double-layered membrane surrounding the nucleus of a eukaryotic cell, separating the nucleoplasm from the cytoplasm.


It is made up of two layers, each composed of a lipid bilayer. It is perforated with holes, called nuclear pores, to facilitate and regulate the exchange of materials (for example, proteins and RNA) between the nucleus and the cytoplasm. In between these two membranes is a space called perinuclear space. The outer membrane is continuous with the endoplasmic reticulum. The inner membrane is associated with a network of intermediate filaments called nuclear lamina, which is made of lamin. The lamina acts as a site of attachment for chromosomes. It also acts like a shield for the nucleus.

Word origin: Greek, from peri, around, near + -nuclear, from nucleus; membrane » Latin membrana "skin of body".


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Spontaneous formation of nuclear membrane

I have doubt regarding double membranes around nucleus. Single membrane structures may be formed spontaneously due ... is form spontaneously because they are produced from parent organelles. Do nuclear pore complex have any role in the case of nucleus?

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by josem
Sun Jun 22, 2014 1:14 am
Forum: Cell Biology
Topic: Spontaneous formation of nuclear membrane
Replies: 1
Views: 2671

Re: Help with indentifying object - can't narrow to even kingdom

... to several centimeters in diameter, without cell walls and only a cell membrane to keep everything in. This “supercell” (a syncytium) is essentially ... slime molds ideal tools for scientists studying mitosis, the process of nuclear division. Occasionally, during rainy periods, large plasmodia ...

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by Sadial
Fri Jul 26, 2013 6:29 pm
Forum: General Discussion
Topic: Help with indentifying object - can't narrow to even kingdom
Replies: 2
Views: 6289

What does describe mean in this question?

... Kinases (CDKs) associated with the reorganization of the nuclear membrane during mitosis. Explain how the phosphorylation of these proteins affects their function ...

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by TToe
Mon Feb 18, 2013 10:33 am
Forum: Cell Biology
Topic: What does describe mean in this question?
Replies: 1
Views: 2290

Biology question help?

... likely to contain a signal peptide? Options: 1.Cytosolic proteins 2. Nuclear Proteins 3. Secretory proteins 4. Membrane proteins I think the answer is membrane proteins

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by revision
Sat Dec 08, 2012 6:24 pm
Forum: Molecular Biology
Topic: Biology question help?
Replies: 5
Views: 3912

Re: Animal cell nucleus shape changes

... nucleus during cell division is to temporarily get out of the way; the nuclear membrane disappears for a while. Transcription occurs in the nucleus, but then the mRNA is ...

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by jonmoulton
Fri Nov 16, 2012 4:03 pm
Forum: Cell Biology
Topic: Animal cell nucleus shape changes
Replies: 7
Views: 12186
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