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Nucleus, in biology, a specialized structure occurring in most cells (except bacteria and blue-green algae) and separated from the rest of the cell by a double layer, the nuclear membrane. The nucleus controls and regulates the activities of the cell (e.g., growth and metabolism) and carries the genes.
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 ...
Nucleus the prominent and specialized organelle of the cell. It is present in all eukaryotic cells and is responsible for controlling the activities of the cell.
Nov 6, 2019 · Nuclear Envelope and Nuclear Pores . The cell nucleus is bound by a double membrane called the nuclear envelope.This membrane separates the contents of the nucleus from the cytoplasm, the gel-like substance containing all other organelles.The nuclear envelope consists of phospholipids that form a lipid bilayer much like that of the cell membrane.
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NUCLEUS definition: 1. the central part of an atom, usually made up of protons and neutrons 2. the part of a cell that…. Learn more.
Oct 4, 2019 · Cell Nucleus Definition. The cell nucleus is a large organelle in eukaryotic organisms which protects the majority of the DNA within each cell. The nucleus also produces the necessary precursors for protein synthesis.
Sep 1, 2023 · The nucleus is the organelle responsible for maintaining the integrity of DNA and for controlling cellular activities such as metabolism, growth, and reproduction by regulating gene expression. The nucleus is the largest cytoplasmic structure in animal cells. In mammalian cells, the average diameter is 6 µm.
Chromatin; Nucleolus; References; Typically, the nucleus is the most prominent organelle in a cell. The nucleus (plural = nuclei) houses the cell’s DNA in the form of chromatin and directs the synthesis of ribosomes and proteins.Let us look at it in more detail (Figure \(\PageIndex{1}\)).Figure \(\PageIndex{1}\): The outermost boundary of the nucleus is the nuclear envelope.
nucleus: [noun] the small bright body in the head of a comet. the small brighter and denser portion of a galaxy (see galaxy 1b).
