nucleus
central portion of a cell; specialized, central, and organized structure found in most cells containing the chromosomes
Source: Noland, George B. 1983. General Biology, 11th Edition. St. Louis, MO. C. V. Mosby ...
Pronucleus
[Gr. pro- - a prefix meaning before, in front of; L. nux - nut]. The haploid, or reduced, nucleus of a gamete (ie. sperm and egg). The reduced nuclei of the sperm and egg join together in the fertilized ovum to form the zygote.
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Definition of nucleus :
1. The membrane bound organelle containing the genome of eukaryotes organized into chromosomes.
2. The center portion of an atom which contains the protons and neutrons.
In Botany, a nucleus is the central kernel of a nut or seed, or the center of a starch granule.
In Anatomy, a nucleus is a group of specialized nerve cells in the brain or spinal cord.
Nucleus
A nucleus is a membrane-bound organelle that contains the cell's chromosomes. Pores in the nuclear membrane allow for the passage of molecules in and out of the nucleus.
Narration Transcription ...
The Nucleus
The nucleus is the hallmark of eukaryotic cells; the very term eukaryotic means having a "true nucleus".
The Nuclear Envelope ...
Cell Nucleus - Commanding the Cell
The cell nucleus acts like the brain of the cell. It helps control eating, movement, and reproduction. If it happens in a cell, chances are the nucleus knows about it.
Cell nucleus
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The nucleus is a highly specialized organelle that serves as the information processing and administrative center of the cell.
Nucleus."The nucleus is a minute body, imbedded in the protoplasm, and usually of a spherical or oval form, its size having little relation to that of the cell.
nucleus -- Membrane-bound organelle which contains the DNA in the form of chromosomes. It is the site of DNA replication, and the site of RNA synthesis.
nucleus - organelle in the center of the cell which contains the chromosomes.
organelles - membrane bound structures found inside the cell.
nucleus (cell) The largest, most prominent organelle in eukaryotic cells; a round or oval body that is surrounded by the nuclear envelope and contains the genetic information necessary for control of cell structure and function. PICTURE ...
nucleus: The central part of a cell where the chromosomes are contained.
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parasites: Plants or animals that live off another creature (or even inside it), obtaining food and protection without offering any benefit in return.
nucleus
[L. a kernel]
(1) An atom's central core, containing protons and neutrons. (2) The chromosome-containing organelle of a eukaryotic cell. (3) A cluster of neurons.
null hypothesis ...
Nucleus The organelle in eukaryotic cells that contains genetic material.
Oocyte (oh-oh-SITE) The developing female reproductive cell; an immature egg.
Nucleus. The membrane-bound region of a eukaryotic cell that contains the chromosomes.
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Occupational Safety and Health Act. See Occupational Safety and Health Administration.
nucleus
An organelle of eukaryotic cells that is bounded by a nuclear membrane and contains the chromosomes whose genes control the structure of proteins within the cell.
Covered in: BIOL1020 Lab 3 Cells
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pronucleus - haploid, gametic nucleus (from sperm or egg) in a fertilized egg, prior to fusion to form a zygote nucleus ...
The Nucleus
DNA is located in an organelle called the nucleus.
Transcription and mRNA processing occur in the nucleus.
macronucleus In ciliates, the large nucleus that carries up to several hundred copies of the genome and controls metabolism and asexual reproduction. PICTURE ...
Nucleus: The nucleus is the most obvious organelle in any eukaryotic cell. It is enclosed in a double membrane and communicates with the surrounding cytosol via numerous nuclear pores.
Nucleus
The term introduced by Brown (1833) for the more or less spherical structure which occures in cells and stains deeply with basic dyes. The cellular organelle in eukaryotes that contains the genetic material.
Related Terms:
Eukaryote ...
Nucleus
Nutrition
(Date:3/28/2011)... have completed the first human randomized controlled trial ... uses a catheter-based probe inserted into the renal ... nerves near the kidneys (or in the renal ...
Nucleus
Double membrane surrounding the chromosomes and the nucleolus. Pores allow specific communication with the cytoplasm. The nucleolus is a site for synthesis of RNA making up the ribosome.
Nucleus
- A membrane-enclosed organelle of the eukaryote that contains the chromosomes and nucleolus
Nutrigenomics ...
Nucleus, nuclear membrane continuous with endoplasmic reticulum, ribosomes on ER, golgi budding off vesicles to outside
The pathway whereby bacteria and worn out mitochondria are degraded by lysosomes ...
nucleus - prominent membrane-bound organelle in a eucaryotic cell, containing DNA organized into chromosomes.
nucleus Cell nucleus; a spheroid body within a cell, contained in a double membrane, the nuclear envelope, and containing chromosomes and one or more nucleoli. The genetic control center of a eukaryotic cell.
1. The nucleus of any cell.
2. A nucleus that has been excised from a cell.
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z ...
Related Terms:
Nucleus
The term introduced by Brown (1833) for the more or less spherical structure which occures in cells and stains deeply with basic dyes. The cellular organelle in eukaryotes that contains the genetic material.
A single-celled, microscopic prokaryotic organism: a single cell organism without a distinct nucleus. Base pair (bp). A pair of complementary nitrogenous bases in a DNA molecule--adenine-thymine and guanine-cytosine.
Chromosome -- in the eukaryotic nucleus, one of the threadlike structures consisting of chromatin and carry genetic information arranged in a linear sequence.
Centrioles - essential tubular organelles found near the nucleus in pairs that aid in cellular division
Chlorophyll - the green material found in chloroplasts that is active in photosynthesis ...
A human cell is made up a central nucleus (containing DNA) a cytoplasm and a outer cell membrane.
Centimorgan (cM) A unit of measure of recombination frequency.
For example, in the nucleus of a HeLa cell the concentration of soluble RNA polymerase II is ~1 mM, but the local concentration in a factory is 1000-fold higher.
In this technique, the nucleus of a recipient egg is removed to make way for the genetic material of the donor (Fig. 5). The donor cell is fused with the enucleated egg cell by subjecting the two cells to pulses of electricity.
eukaryotic - cell has nucleus; divides through mitosis
The cytoplasmic membrane of prokaryotes is fundamentally similar to that of a eukaryotic cell.
In a star like our Sun, one proton of Hydrogen (mass 1) fuses with another proton of Hydrogen that decays to a neutron creating a nucleus of Deuterium (mass 2). Deuterium possesses one proton and one neutron.
Chromosome: Structure in a cell nucleus that carries the genes. Each chromosome consists of one very long strand of DNA, coiled and folded to produce a compact body. They become more compact and visible during metaphase of cell division.
In a process called "somatic cell nuclear transfer" (SCNT), scientists transfer genetic material from the nucleus of a donor adult cell to an egg whose nucleus, and thus its genetic material, has been removed.
One of the threadlike "packages" of genes and other DNA in the nucleus of a cell. Different kinds of organisms have different numbers of chromosomes. Humans have 23 pairs of chromosomes - so 46 in all - 44 autosomes and two sex chromosomes.
RNA SPLICING - A complex and incompletly understood series of reactions occuring in the nucleus of eukaryotic cells in which pre-mRNA transcribed from chromosomal DNA is processed such that noncoding regions of the pre-mRNA (introns) are excised, ...
Primary transcript: When a gene is transcribed in the nucleus, the initial product is the primary transcript, an RNA containing copies of all exons and introns.
Eukaryote organisms whose cells have a true nucleus
(eu = good‚ well‚ true; karyon = nut‚ kernel‚ nucleus)
Euryhaline having a wide range of salt concentration tolerance ...
The Protista Kingdom consists of unicellular life forms (life forms with only one cell) who have a nucleus. The primary difference between protists and monerans is that protists are more complex, having a nucleus.
Also, these chloroplasts contain what is called a nucleomorph, a DNA containing structure thought to be the vestige of a eukaryotic nucleus. (Prokaryotes and organelles don't have a membrane bound nucleus, their DNA just "floats free".) ...
Microinjection
A method of introducing new DNA into a cell by injecting it directly into the nucleus.
Minimal essential pairing sequence (MEPS)
The shortest length of DNA homology required for the initiation of homologous recombination.
Heterokaryon A cell with more than one nucleus formed by the fusion of two or more cells (usually of different species). The first stage in making a somatic cell hybrid.
Particles occurring in the nucleus and cytoplasm of cells, usually as a result of virus infection ...
A variety of RNAs found in the nucleus, including primary transcripts.
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bacterium (plural: bacteria). A single-celled, microscopic, plantlike organism that lacks a nucleus. Most bacteria obtain their nitrogen and energy from organic matter; some bacteria cause plant or animal diseases.
Microinjection: The introduction of DNA into the nucleus of an oocyte, embryo, or other cell by injection through a very fine needle.
In eukaryotes, genomic DNA is located in the cell nucleus, along with small amounts in mitochondria and chloroplasts. In prokaryotes, the DNA is held within an irregularly shaped body in the cytoplasm called the nucleoid.
Chromosome: A linear sequence of genes wound up with proteins into a single unit that is found in the nucleus of cells. See also DNA, genes.
A component of a cell with the proviso that the component is part of some larger object, which may be an anatomical structure, e.g. rough endoplasmic reticulum or nucleus, or a gene product group, e.g. ribosome, proteasome or a heterodimeric protein.
Nuclear envelope A double membrane, consisting of the inner nuclear membrane and the outer nuclear membrane, that surrounds the nucleus and is punctured with openings called nuclear pores.
 See also: Cells, Cell, Organ, Protein, Trans
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