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The nuclear matrix is also believed to be contained in the nucleoplasm where it functions to maintain the size and shape of the nucleus, in a role similar to that of the cytoskeleton found in the cytoplasm. [10] However, the existence and the exact function of the nuclear matrix remain unclear and heavily debated.
The nuclear envelope, also known as the nuclear membrane, [1] [a] is made up of two lipid bilayer membranes that in eukaryotic cells surround the nucleus, which encloses the genetic material. The nuclear envelope consists of two lipid bilayer membranes: an inner nuclear membrane and an outer nuclear membrane. [ 4 ]
A North American nuclear family. For social conservatism in the United States and Canada, the idea that the nuclear family is traditional is a very important aspect, where family is seen as the primary unit of society. These movements oppose alternative family forms and social institutions that are seen by them to undermine parental authority.
Since the nuclear pores are located in an area of high traffic, they play an important role in cell physiology. The space between the outer and inner membranes is called the perinuclear space and is joined with the lumen of the rough ER. The nuclear envelope's structure is determined by a network of intermediate filaments (protein filaments).
The cell nucleus contains nearly all of the cell's genome. Nuclear DNA is often organized into multiple chromosomes – long strands of DNA dotted with various proteins, such as histones, that protect and organize the DNA. The genes within these chromosomes are structured in such a way to promote cell function.
The nuclear envelope (membrane), a defining characteristic of the eukaryotic cell, was suggested to have arisen as an adaptation for segregating the original archaeal host DNA genome away from the proto-mitochondria, the main source of damaging reactive oxygen species.
Cell biology (also cellular biology or cytology) is a branch of biology that studies the structure, function, and behavior of cells. [1] [2] All living organisms are made of cells. A cell is the basic unit of life that is responsible for the living and functioning of organisms. [3] Cell biology is the study of the structural and functional ...
Lamins, also known as nuclear lamins are fibrous proteins in type V intermediate filaments, providing structural function and transcriptional regulation in the cell nucleus. Nuclear lamins interact with inner nuclear membrane proteins to form the nuclear lamina on the interior of the nuclear envelope .