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- DictionaryNu·cle·us/ˈno͞oklēəs/
noun
- 1. the central and most important part of an object, movement, or group, forming the basis for its activity and growth: "the nucleus of a film-producing industry"
- 2. the positively charged central core of an atom, consisting of protons and neutrons and containing nearly all its mass.
Sep 1, 2023 · Biology definition: A nucleus is a large double-membraned organelle that is sometimes referred to as the “central unit” of the cell because it contains the chromosomes that bear the genetic material. It is not found only in eukaryotic cells and not in prokaryotic cells.
a centre of growth or development; basis; kernel. the nucleus of an idea. biology (in the cells of eukaryotes) a large compartment, bounded by a double membrane, that contains the chromosomes and associated molecules and controls the characteristics and growth of the cell.
Nov 6, 2019 · Definition, Structure, and Function. The cell nucleus is a membrane-bound structure that contains a cell's hereditary information and controls its growth and reproduction. It is the command center of a eukaryotic cell and is usually the most notable cell organelle in both size and function.
The nucleus (plural, nuclei) houses the cell’s genetic material, or DNA, and is also the site of synthesis for ribosomes, the cellular machines that assemble proteins. Inside the nucleus, chromatin (DNA wrapped around proteins, described further below) is stored in a gel-like substance called nucleoplasm.
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 5.8.1 5.8. 1 ).
biology specialized. the part of a cell that controls its growth: DNA is stored in the nucleus of a cell. CHRISTOPH BURGSTEDT/SCIENCE PHOTO LIBRARY/GettyImages. the nucleus of something. the group of people or things that are the most important part of something: These three players will form the nucleus of a revised and stronger team. See more.
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.
