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  2. Cell nucleus - Wikipedia

    en.wikipedia.org/wiki/Cell_nucleus

    The main function of the cell nucleus is to control gene expression and mediate the replication of DNA during the cell cycle. [1]: 171 It has been found that replication happens in a localised way in the cell nucleus. In the S phase of interphase of the cell cycle; replication takes place.

  3. Nucleolus - Wikipedia

    en.wikipedia.org/wiki/Nucleolus

    The nucleolus (/ nj uː ˈ k l iː ə l ə s, ˌ nj uː k l i ˈ oʊ l ə s /; pl.: nucleoli /-l aɪ /) is the largest structure in the nucleus of eukaryotic cells. [1] It is best known as the site of ribosome biogenesis. The nucleolus also participates in the formation of signal recognition particles and plays a role in the cell's response to ...

  4. Nucleoplasm - Wikipedia

    en.wikipedia.org/wiki/Nucleoplasm

    The cytoplasm contains the cytoskeleton, a network of protein filaments found in all cells, while the nucleoplasm is believed to contain the nuclear matrix, a hypothetically analogous network of filaments that organizes the organelles and genetic information within the nucleus. While the structure and function of the cytoskeleton have been well ...

  5. Cell (biology) - Wikipedia

    en.wikipedia.org/wiki/Cell_(biology)

    Most important among these is a cell nucleus, [2] an organelle that houses the cell's DNA. This nucleus gives the eukaryote its name, which means "true kernel (nucleus)". Some of the other differences are: The plasma membrane resembles that of prokaryotes in function, with minor differences in the setup. Cell walls may or may not be present.

  6. Nuclear envelope - Wikipedia

    en.wikipedia.org/wiki/Nuclear_envelope

    The nuclear envelope, also known as the nuclear membrane, [1] [a] is made up of two lipid bilayer membranes that in eukaryotic cells surround the nucleus, which encloses the genetic material. The nuclear envelope consists of two lipid bilayer membranes: an inner nuclear membrane and an outer nuclear membrane. [ 4 ]

  7. Nuclear pore complex - Wikipedia

    en.wikipedia.org/wiki/Nuclear_pore_complex

    The count of nuclear pore complexes varies across cell types and different stages of the cell's life cycle, with approximately 1,000 NPCs typically found in vertebrate cells. [12] The human nuclear pore complex (hNPC) is a substantial structure, with a molecular weight of 120 megadaltons (MDa). [ 13 ]

  8. Cell biology - Wikipedia

    en.wikipedia.org/wiki/Cell_biology

    A diagram of an animal cell. Eukaryotic cells are composed of the following organelles: Nucleus: The nucleus of the cell functions as the genome and genetic information storage for the cell, containing all the DNA organized in the form of chromosomes.

  9. Cytoplasm - Wikipedia

    en.wikipedia.org/wiki/Cytoplasm

    The term was introduced by Rudolf von Kölliker in 1863, originally as a synonym for protoplasm, but later it has come to mean the cell substance and organelles outside the nucleus. [ 4 ] [ 5 ] There has been certain disagreement on the definition of cytoplasm, as some authors prefer to exclude from it some organelles, especially the vacuoles ...