Eukaryotic membrane-bounded organelle containing DNA
HeLa cells stained for nuclear DNA with the blue fluorescent Hoechst dye. The central and rightmost cells are in interphase, thus their entire nuclei are labeled. On the left, a cell is going through mitosis and its DNA has condensed.
Cell biology
Animal cell diagram
Components of a typical animal cell:
Nucleolus
Nucleus
Ribosome (dots as part of 5)
Vesicle
Rough endoplasmic reticulum
Golgi apparatus (or, Golgi body)
Cytoskeleton
Smooth endoplasmic reticulum
Mitochondrion
Vacuole
Cytosol (fluid that contains organelles; with which, comprises cytoplasm)
Lysosome
Centrosome
Cell membrane
The cell nucleus (from Latin nucleus or nuculeus 'kernel, seed'; pl.: nuclei) is a membrane-bound organelle found in eukaryotic cells. Eukaryotic cells usually have a single nucleus, but a few cell types, such as mammalian red blood cells, have no nuclei, and a few others including osteoclasts have many. The main structures making up the nucleus are the nuclear envelope, a double membrane that encloses the entire organelle and isolates its contents from the cellular cytoplasm; and the nuclear matrix, a network within the nucleus that adds mechanical support.
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 nucleus maintains the integrity of genes and controls the activities of the cell by regulating gene expression.
Because the nuclear envelope is impermeable to large molecules, nuclear pores are required to regulate nuclear transport of molecules across the envelope. The pores cross both nuclear membranes, providing a channel through which larger molecules must be actively transported by carrier proteins while allowing free movement of small molecules and ions. Movement of large molecules such as proteins and RNA through the pores is required for both gene expression and the maintenance of chromosomes. Although the interior of the nucleus does not contain any membrane-bound subcompartments, a number of nuclear bodies exist, made up of unique proteins, RNA molecules, and particular parts of the chromosomes. The best-known of these is the nucleolus, involved in the assembly of ribosomes.
cellnucleus (from Latin nucleus or nuculeus 'kernel, seed'; pl.: nuclei) is a membrane-bound organelle found in eukaryotic cells. Eukaryotic cells usually...
nucleus, the very dense central region of an atom Cellnucleus, a central organelle of a eukaryotic cell, containing most of the cell's DNA Nucleus may...
consists of taking a denucleated oocyte (egg cell) and implanting a donor nucleus from a somatic (body) cell. It is used in both therapeutic and reproductive...
A nucleated red blood cell (NRBC), also known by several other names, is a red blood cell that contains a cellnucleus. Almost all vertebrate organisms...
(3); an uninfected cell shown at (2) and (4) showing the difference between an infected cellnucleus and an uninfected cellnucleus. Epithelium grown in...
is made up of two lipid bilayer membranes that in eukaryotic cells surround the nucleus, which encloses the genetic material. The nuclear envelope consists...
capillary network. In humans, mature red blood cells are flexible biconcave disks. They lack a cellnucleus (which is expelled during development) and organelles...
chromosomes divide within an intact cellnucleus. Most animal cells undergo a shape change, known as mitotic cell rounding, to adopt a near spherical...
eukaryotic cells by the absence of a cellnucleus or other membrane-bound organelle. Prokaryotic cells are much smaller than eukaryotic cells, making them...
muscle cells have a single nucleus. The unusual microscopic anatomy of a muscle cell gave rise to its terminology. The cytoplasm in a muscle cell is termed...
strands unitedly called “double helix”. In eukaryotes, DNA consists of a cellnucleus and the DNA is providing strength and direction to the mechanism of heredity...
Barr body per somatic cellnucleus, while a genotypical male (46, XY) has none. The Barr body can be seen in the interphase nucleus as a darkly staining...
In mammals, magnocellular neurosecretory cells in the paraventricular nucleus and the supraoptic nucleus of the hypothalamus produce neurohypophysial...
the type of protoplasm that makes up the cellnucleus, the most prominent organelle of the eukaryotic cell. It is enclosed by the nuclear envelope, also...
mature mRNA. The mature mRNA is exported from the cellnucleus via nuclear pores to the cytoplasm of the cell for translation to occur. During translation...
in every living cell of every life-form on Earth. In turn, they send and express that information inside and outside the cellnucleus. From the inner...
The solitary nucleus (also called nucleus of the solitary tract, nucleus solitarius, or nucleus tractus solitarii (SN or NTS)) is a series of sensory nuclei...
daughter cells in a process called cell division. In eukaryotic cells (having a cellnucleus) including animal, plant, fungal, and protist cells, the cell cycle...
antinuclear factor or ANF) are autoantibodies that bind to contents of the cellnucleus. In normal individuals, the immune system produces antibodies to foreign...
In cell biology, the cytoplasm describes all material within a eukaryotic cell, enclosed by the cell membrane, except for the cellnucleus. The material...
for each daughter cell. Eukaryotic organisms (animals, plants, fungi and protists) store most of their DNA inside the cellnucleus as nuclear DNA, and...
synthesized in cells from amino acids according to mRNA transcripts, which are synthesized from DNA templates inside the cellnucleus. Preprohormones...
developing into mature red blood cells. Like mature red blood cells, in mammals, reticulocytes do not have a cellnucleus. They are called reticulocytes...
The dorsal nucleus of vagus nerve (or posterior nucleus of vagus nerve or dorsal vagal nucleus or nucleus dorsalis nervi vagi or nucleus posterior nervi...
Global Information
