Breakdown and Formation of the Nuclear Membrane
During cell division, the nuclear membrane breaks down, allowing the chromosomes to separate, and subsequently reforms around the newly formed nuclei in daughter cells.
Break Down
The nuclear membrane break down begins at the beginning of prophase and continues till prometaphase. This disintegration allows the spindle apparatus to capture the condensed chromosomes. The nuclear membrane disintegration occurs by the phosphorylation of the nuclear pore proteins and break down of the nuclear lamina.
Reformation
Nuclear envelope reformation starts during the anaphase and lasts into the G1 phase of the cell cycle in species with open mitosis. At the end of anapahase or in early telophase, the nuclear membrane starts to reassemble around the separated sets of chromosomes. This process involves the dephosphorylation of nuclear pore proteins and the reformation of nuclear pores. The nuclear envelope precursors, which are derived from the endoplasmic reticulum (ER) membranes, begin to enclose the chromatin.
Nuclear Membrane – Function, Structure, and Diagram
The nuclear membrane is a double-layered structure surrounding the nucleus in eukaryotic cells. It serves as a protective barrier and consists of an outer and inner lipid bilayer. The nuclear membrane regulates the passage of molecules in and out of the nucleus. The nuclear membrane is absent in prokaryotes. In this article, we will learn about the parts and functions of the nuclear membrane and more.
Table of Content
- What is Nuclear Membrane?
- Nuclear Membrane Structure
- Nuclear Membrane Diagram
- Breakdown and Formation of the Nuclear Membrane
- Functions of the Nuclear Membrane
- Importance of the Nuclear membrane
- Difference Between Plasma and Nuclear Membrane
- Difference Between Plant and Animal Nuclear Membrane
- Diseases Caused by the Defects in Nuclear Membrane
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