nucleus definition
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- By Regina Bailey. Definition: The nucleus is a membrane bound structure that contains the cell's hereditary information and controls the cell's growth and reproduction.It is commonly the most prominent organelle in the cell.The nucleus is surrounded by a structure called the nuclear envelope.This membrane separates the contents of the nucleus from the cytoplasm. The cell's chromosomes are also housed within the nucleus.he nucleus is surrounded by a structure called the nuclear envelope. This membrane separates the contents of the nucleus from the cytoplasm. The cell's chromosomes are also housed within the nucleus.
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The Nucleus The Nucleus. The nucleus is the cell's control center-that is, it contains the genetic information to do and make everything that goes on within a cell.he nucleus is surrounded by a nuclear envelope, which is a double membrane that protects the nucleus by filtering what can leave and enter (like the cell membrane), and separates the nucleus from the rest of the cell.
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- The Cell Nucleus The nucleus is a highly specialized organelle that serves as the information processing and administrative center of the cell.his organelle has two major functions: it stores the cell's hereditary material, or DNA, and it coordinates the cell's activities, which include growth, intermediary metabolism, protein synthesis, and reproduction (cell division). Only the cells of advanced organisms, known as eukaryotes, have a nucleus.
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The Cell Nucleus The Cell Nucleus: The cell nucleus is a membrane bound structure that contains the cell's hereditary information and controls the cell's growth and reproduction. It is the command center of a eukaryotic cell and is commonly the most prominent organelle in a cell.Distinguishing Characteristics:ike the cell membrane, the nuclear envelope consists of phospholipids that form a lipid bilayer. The envelope helps to maintain the shape of the nucleus and assists in regulating the flow of molecules into and out of the nucleus through nuclear pores. Chromosomes are located within the nucleus.
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chapter 3 summary the nucleus. the control center of the cell. most cells have a single nucleus. without a nucleus, a cell cannot divide or synthesize more proteins, and is detined to die. is is surrounded by the nuclear envelope, a double membrane penetrated by fairly large pores.
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- In cell biology, the nucleus (pl. nuclei; from Latin nucleus or nuculeus, meaning kernel) is a membrane-enclosed organelle found in eukaryotic cells.Eukaryotes usually have a single nucleus, but a few cell types have no nuclei, and a few others have many.uclei; from Latin nucleus or nuculeus, meaning kernel) is a membrane-enclosed organelle found in eukaryotic cells. Eukaryotes usually have a single nucleus, but a few cell types have no nuclei, and a few others have many.
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Chapter-5, The Fundamental Unit of Life The cell nucleus is a double membrane‐bound organelle that contains the genetic information of the cell packaged in the form of chromatin. The nucleus is a characteristic feature of most eukaryotic cells. The nucleus is considered to be one of the most important structures of eukaryotic cells as it serves the function of information storage, retrieval and duplication of genetic information. It is a double membrane‐bound organelle that harbours the genetic material in the form of chromatin.
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Nucleus The nucleus is the largest organelle in animal cells. In mammalian cells, the average diameter is 6 µm. There are cells though that lack nuclei, such as human red blood cells.
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What does the nucleus contain? The nucleus is the centre of an atom and contains protons and neutrons. The number of protons will always be the same for a specific element but the number of neutrons can var … y, resulting in isotopes of the element of which only 1 is usually stable. 10 people found this useful.
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- In cell biology, the nucleus (pl. nuclei; from Latin nucleus or nuculeus, meaning kernel) is a membrane-enclosed organelle found in eukaryotic cells. Eukaryotes usually have a single nucleus, but a few cell types have no nuclei, and a few others have many. Cell nuclei contain most of the cell's genetic material, organized as multiple long linear DNA molecules in complex with a large variety of proteins, such as histones, to form chromosomes.
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Cell nucleus In cell biology, the nucleus (pl. nuclei; from Latin nucleus or nuculeus, meaning kernel) is a membrane-enclosed organelle found in eukaryotic cells. Eukaryotes usually have a single nucleus, but a few cell types have no nuclei, and a few others have many.Cell nuclei contain most of the cell's genetic material, organized as multiple long linear DNA molecules in complex with a large variety of proteins, such as histones, to form chromosomes.n cell biology, the nucleus (pl. nuclei; from Latin nucleus or nuculeus, meaning kernel) is a membrane-enclosed organelle found in eukaryotic cells. Eukaryotes usually have a single nucleus, but a few cell types have no nuclei, and a few others have many.
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Cell Nucleus The nucleus is a cell organelle that consists of a double membrane also known as the nuclear envelope. This structure is one of the fundamental ways of differentiating between eukaryotic cells (eu = true, karyon = nucleus) and prokaryotic cells (pro = before, karyon= nucleus).he nucleus is the control centre of the cell, and contains the genetic material that is organized in chromosomes. This compartment of the cell is responsible for the expression of the genes contained in the chromosomes, as well, it is the major site for cell reproduction and growth. mitosis courtesy of.
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What is a nucleoid? The nucleoid (meaning nucleus-like) is an irregularly-shaped region within the cell of prokaryotes which has nuclear material without a nuclear membrane and where the genetic … material is localized.he length of a genome widely varies, but generally is at least a few million base pairs. Storage of the genome within a nucleoid can be contrasted against that within eukaryotes, where the genome is packed into chromatin and sequestered within a membrane-enclosed organelle called the nucleus.
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Atomic nucleus The nucleus is the small, dense region consisting of protons and neutrons at the center of an atom, discovered in 1911 by Ernest Rutherford based on the 1909 Geiger–Marsden gold foil experiment.
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nuclei The nucleus also contains at least one spherical nucleolus, which mainly contains RNA and proteins and directs the construction of the cell's ribosomes. See more at cell. The solid central part of a comet, typically several kilometers in diameter and composed of ice, frozen gases, and embedded chunks of rock and dust.
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nucleus 1 An example of a nucleus is the center core of an atom. 2  An example of a nucleus is the fiction department of a book publisher where most of the money is made and which is considered the heart of the publisher's organization. model of an atom showing the nucleus. A model of an atom showing the nucleus. The nucleus is the center core of an atom that has a positive charge and that contains most of the atom's mass, or the central heart of an organization or group. 1  An example of a nucleus is the center core of an atom.
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Nucleus Nucleus a double-membrane bound cell organelle present in eukaryotic cells. The nucleus constitutes most of the genetic material of the cell-the DNA. The nucleus maintains the integrity of the genes which regulate the gene expression, in-turn regulating the activities of the cell.
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- The cell nucleus is a membrane bound structure that contains the cell's hereditary information and controls the cell's growth and reproduction. It is the command center of a eukaryotic cell and is commonly the most prominent organelle in a cell.
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Cell nucleus nuclei; from Latin nucleus or nuculeus, meaning kernel) is a membrane-enclosed organelle found in eukaryotic cells. Eukaryotes usually have a single nucleus, but a few cell types have no nuclei, and a few others have many.ost eukaryotic cell types usually have a single nucleus, but some have no nuclei, while others have several. This can result from normal development, as in the maturation of mammalian red blood cells, or from faulty cell division.
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- The term nucleus (kern in the old German literature, where for example the mandelkern mean the almond nucleus and referred to the amygdala) meant a collection of nerve cell bodies in a subcortical structure in the brain, but occasionally also in the spinal cord (as in Clarke's nucleus or Onuf's nucleus).
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- Abstract. The cell nucleus is a double membrane‐bound organelle that contains the genetic information of the cell packaged in the form of chromatin. The nucleus is a characteristic feature of most eukaryotic cells.
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Cell nucleus nuclei; from Latin nucleus or nuculeus, meaning kernel) is a membrane-enclosed organelle found in eukaryotic cells. Eukaryotes usually have a single nucleus, but a few cell types have no nuclei, and a few others have many.ell nuclei contain most of the cell's genetic material, organized as multiple long linear DNA molecules in complex with a large variety of proteins, such as histones, to form chromosomes. The genes within these chromosomes are the cell's nuclear genome.
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- Definition of NUCLEOLUS. : a spherical body of the nucleus of most eukaryotes that becomes enlarged during protein synthesis, is associated with a nucleolus organizer, and contains the DNA templates for ribosomal RNA — see cell illustration. a spherical body of the nucleus of most eukaryotes that becomes enlarged during protein synthesis, is associated with a nucleolus organizer, and contains the DNA templates for ribosomal RNA — see cell illustration.
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- Abstract. The cell nucleus is a double membrane‐bound organelle that contains the genetic information of the cell packaged in the form of chromatin.The nucleus is a characteristic feature of most eukaryotic cells.he cell nucleus contains nonmembranous distinct substructures that are characterised by having a specific subset of proteins and RNA. The nuclear envelope is a highly regulated membrane barrier that allows the compartmentalisation of the nucleus from the cytoplasm.
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- Noun. 1. nucleoplasm-the protoplasm that constitutes the nucleus of a cell. karyoplasm. living substance, protoplasm-the substance of a living cell (including cytoplasm and nucleus). cell nucleus, karyon, nucleus-a part of the cell containing DNA and RNA and responsible for growth and reproduction.oun. 1. nucleoplasm-the protoplasm that constitutes the nucleus of a cell. karyoplasm. living substance, protoplasm-the substance of a living cell (including cytoplasm and nucleus). cell nucleus, karyon, nucleus-a part of the cell containing DNA and RNA and responsible for growth and reproduction.
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nuclear Biology Of, relating to, or forming a nucleus of a cell: a nuclear membrane. Physics a. Of or relating to atomic nuclei: a nuclear chain reaction. b. Using or derived from the energy of atomic nuclei: nuclear power. Of, using, or possessing atomic or hydrogen bombs: nuclear war; nuclear nations.