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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. Cell cycle - Wikipedia

    en.wikipedia.org/wiki/Cell_cycle

    The eukaryotic cell cycle consists of four distinct phases: G 1 phase, S phase (synthesis), G 2 phase (collectively known as interphase) and M phase (mitosis and cytokinesis). M phase is itself composed of two tightly coupled processes: mitosis, in which the cell's nucleus divides, and cytokinesis, in which the cell's cytoplasm and cell membrane divides forming two daughter cells.

  4. Cajal body - Wikipedia

    en.wikipedia.org/wiki/Cajal_body

    They are about 0.1–2.0 micrometres and are found one to five per nucleus. The number varies in different types of cells and over the cell cycle. Maximum number is reached in mid G 1 phase and towards G 2 they become larger and their number decreases. CBs disassemble during the M phase and reappear again later in G 1 phase.

  5. Megakaryocyte - Wikipedia

    en.wikipedia.org/wiki/Megakaryocyte

    In general, megakaryocytes are 10 to 15 times larger than a typical red blood cell, averaging 50–100 μm in diameter. During its maturation, the megakaryocyte grows in size and replicates its DNA without cytokinesis in a process called endomitosis. As a result, the nucleus of the megakaryocyte can become very large and lobulated, which, under ...

  6. Cell (biology) - Wikipedia

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

    The cell on the left is going through mitosis and its chromosomes have condensed. Cell nucleus: A cell's information center, the cell nucleus is the most conspicuous organelle found in a eukaryotic cell. It houses the cell's chromosomes, and is the place where almost all DNA replication and RNA synthesis (transcription) occur.

  7. Mitosis - Wikipedia

    en.wikipedia.org/wiki/Mitosis

    Mitosis in the animal cell cycle (phases ordered counter-clockwise). Mitosis divides the chromosomes in a cell nucleus. Label-free live cell imaging of mesenchymal stem cells undergoing mitosis Onion cells in different phases of the cell cycle enlarged 800 diameters. a. non-dividing cells b. nuclei preparing for division (spireme-stage)

  8. Nuclear–cytoplasmic ratio - Wikipedia

    en.wikipedia.org/wiki/Nuclear–cytoplasmic_ratio

    The nuclear–cytoplasmic ratio (also variously known as the nucleus:cytoplasm ratio, nucleus–cytoplasm ratio, N:C ratio, or N/C) is a measurement used in cell biology. It is a ratio of the size (i.e., volume) of the nucleus of a cell to the size of the cytoplasm of that cell. [1]

  9. Orders of magnitude (length) - Wikipedia

    en.wikipedia.org/wiki/Orders_of_magnitude_(length)

    3–4 μm – size of a typical yeast cell [86] 5 μm – length of a typical human spermatozoon's head [87] 6 μm – thickness of the tape in a 120-minute (C120) compact cassette [88] 7 μm – diameter of the nucleus of a typical eukaryotic cell [citation needed] about 7 μm – diameter of human red blood cells [89]