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Nucleus definition, a central part about which other parts are grouped or gathered core A few faithful friends formed the nucleus of the club. See more..Definition of nucleus for English Language Learners. biology the central part of most cells that contains genetic material and is enclosed in a membrane. physics the central part of an atom that is made up of protons and neutrons. a central or most important part of something..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..A nucleus is often called the brain, or control center, of a eukaryotic cell that is, a cell with a nucleus ..Definition In cell biology, the nucleus is an organelle dubbed as the central The nucleus has three main components the nucleolus, the .Nucleus meaning . the central part of an atom, usually made up of protons and neutrons. the part of a cell that controls its growth . the group of people or .Nuclei from Latin nucleus or nuculeus, meaning kernel or seed is a membrane enclosed organelle found in eukaryotic cells. The nucleus maintains the integrity of genes and controls the activities of the cell by regulating gene expressionthe nucleus is, therefore, the control center of the cell..Nucleus definition The nucleus of an atom or cell is the central part of it. | Meaning, pronunciation, translations and examples..Read medical definition of Nucleus. Nucleus In cell biology, the structure that houses the chromosomes. In neuroanatomy, a group of nerve cells..
Definition of nucleus for English Language Learners biology the central part of most cells that contains genetic material and is enclosed in a membrane physics the central part of an atom that is made up of protons and neutrons.In Chemistry, a nucleus is a fundamental arrangement of atoms that occur in compounds through substitution of atoms without a change in structure. In Astronomy, a nucleus is the center of the head of a comet or the central or brightest part of a nebula or galaxy ..A nucleus surrounded by a membrane is found in almost all the cells of eukaryotes and thus sets them apart from the cells of prokaryotes, such as bacteria, which do not contain nuclei. See more at cell ..The cell nucleus is bound by a double membrane called the nuclear envelope. This membrane separates the contents of the nucleus from the cytoplasm. Like the cell membrane, the nuclear envelope consists of phospholipids that form a lipid bilayer..The main function of the cell nucleus is to control gene expression and mediate the replication of DNA during the cell cycle. The nucleus is an organelle found in eukaryotic cells. Inside its fully enclosed nuclear membrane, it contains the majority of the cell’s genetic material..The nucleolus is a round body located inside the nucleus of a eukaryotic cell. It is not surrounded by a membrane but sits in the nucleus. It is not surrounded by a membrane but sits in the nucleus. The nucleolus makes ribosomal subunits from proteins and ribosomal RNA, also known as rRNA..Nuclei definition, plural of nucleus. See more. n. pl. nucleuses A large, membrane bound, usually spherical protoplasmic structure within a living cell, containing the cell’s hereditary material and controlling its metabolism, growth, and reproduction. karyon A membraneless structure in microorganisms that contains genetic material but does .A nucleus is responsible for determining and controlling what a cell looks like and what it does. Structure A nuclear envelope encloses the nucleus to keep it separate from surrounding materials in the cell..In chemistry, a nucleus is the positively charged center of the atom consisting of protons and neutrons. It’s also known as the “atomic nucleus”. The word “nucleus” comes from the Latin word nucleus, which is a form of the word nux, which means nut or kernel. The term was coined in by Michael Faraday to describe the center of an atom..It is the main control center for the cell and acts kind of like the cell’s brain. Only eukaryotic cells have a nucleus. In fact, the definition of a eukaryotic cell is that it contains a nucleus while a prokaryotic cell is defined as not having a nucleus. Organelle The nucleus is an organelle within the cell..