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- The cell cycle is defined as the events that enable cells to proceed from one cell division event to the next. Cell division itself consists of the overlapping processes of mitosis (nuclear division) and cytokinesis (division of the cytoplasm).
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Revise mitosis, the cell cycle and how stem cells work in humans and plants for GCSE Biology, AQA.
Aug 29, 2024 · Cell division by mitosis is important in the growth and development of multicellular organisms. When a sperm cell fertilises an egg cell in human reproduction, the resulting zygote cell that forms divides by mitosis, with each subsequent cell produced dividing in the same way to form an embryo.
Mitosis and the cell cycle. Mitosis is cell division which produces two identical diploid cells for growth and repair. Differentiation occurs when cells become specialised. Stem...
- G1 Phase
- S Phase
- G2 Phase
- Mitosis
- Cytokinesis
The first stage of interphase is called the G1 phase (first gap) because, from a microscopic aspect, little change is visible. However, during the G1 stage, the cell is quite active at the biochemical level. The cell is accumulating the building blocks of chromosomal DNA and the associated proteins as well as accumulating sufficient energy reserves...
Throughout interphase, nuclear DNA remains in a semi-condensed chromatin configuration. In the S phase, DNA replication can proceed through the mechanisms that result in the formation of identical pairs of DNA molecules—sister chromatids—that are firmly attached to the centromeric region. The centrosome is duplicated during the S phase. The two cen...
In the G2 phase, the cell replenishes its energy stores and synthesizes proteins necessary for chromosome manipulation. Some cell organelles are duplicated, and the cytoskeleton is dismantled to provide resources for the mitotic phase. There may be additional cell growth during G2. The final preparations for the mitotic phase must be completed befo...
Mitosis is divided into a series of phases—Prophase, Prometaphase, Metaphase, Anaphase, and Telophase—that result in the division of the cell nucleus (Figure 13.6). During Prophase, the nuclear envelope starts to dissociate into small vesicles and the membranous organelles (such as the Golgi complex or Golgi apparatus, and endoplasmic reticulum), f...
Cytokinesis, or “cell motion,” is the second main stage of the mitotic phase during which cell division is completed via the physical separation of the cytoplasmic components into two daughter cells. Division is not complete until the cell components have been apportioned and completely separated into the two daughter cells. Although the stages of ...
- Katherine Mattaini
- 2020
Apr 28, 2017 · Mitosis is the step in the cell cycle that the newly duplicated DNA is separated, and two new cells are formed. This process is important in single-celled eukaryotes, as it is the process of asexual reproduction.
Mitosis is the the point in the cell cycle associated with division or distribution of replicated genetic material to two daughter cells. During mitosis the cell nucleus breaks down and two new, fully functional, nuclei are formed.
Mitosis is the point in the cell cycle associated with division or distribution of the chromosomes to two daughter cells. During mitosis the nuclear membrane breaks down and, after the chromosomes segregate to each pole, two new, fully functional, nuclei are formed.
