help with the cell cycle?
955883
This tells you that these cells do not readily divide. So onece there is damage in the spinal cord there are no cell divisions to replace the harmed cells.\n\nCommonly these non-dividing cells are said to be in the G0 phase.
371024
The cells undergo a process known as mitosis. This is when the chromosomes will duplicate themselves and then split into two cells. Hormones often tell cells when to begin mitosis. Your skin grows in 3 layers. The cells towards the inside will multiply and push older skin cells towards the 2nd, and 3rd layer until they die and fall off. This means that your skin in constantly renewing itself.
364043
There are actually TWO organelles that play a direct role in the process of cell division.\n\nThe centrioles are the structures that establish the poles during mitosis and meiosis. But don't forget the cytoskeleton, which is hugely important during the cytokinesis part of each process.
129517
A typical eukaryotic cell cycle consists of several phases.1/(G1) Presynthesis gap (10hours) 2/ S-phase (DNA synthesis) 9 hours 3/ Post-synthesis gap (G2) (4 hours) and 5/ Mitosis (1 hours) (prophase-metaphase-anaphase and telophase). The whole cell cycle during cell division takes approx 24 hours but can vary between cell type and organism.
895516
Prophase\nPrometaphase\nMetaphase\nAnaphase\nTelophase\nCytokinesis\nclick here:http://en.wikipedia.org/wiki/Mitosis#Phases_of_mitosis
747112
from original cell 2 from those (daughter cells)  they each split again which results in 4 cells...hope this helps...the question is hard to understand
217358
Wee1 is a kinase which inhibits cdc2/cdk1 kinase activity, via phosphorylation at Y15.  This residue is dephosphorylated by Cdc25C phosphatase and allows entry into mitosis (or meiotic progression).  It's so called because S Pombe mutants became 'wee' or small due to the mutation of this gene, implying it's role in the cell cycle (specifically mitosis).  \n\nIt's discussed in most cell biology texts.\nie here\nhttp://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Search&db=books&doptcmdl=GenBookHL&term=wee1+AND+mcb%5Bbook%5D+AND+106201%5Buid%5D&rid=mcb.section.3496#3501
881179
the daughter cell will not have the correct amount of chromosomes if S phase does not occur. \n\nthe daughter cell will not have the same amount of chromosomes as parent cell for mitosis, \n\nand daughter cell will not have half the number of chromosomes as parent cell for meiosis.
345920
It divides by mitosis then it begin to grow.According to which type of cell your referring to.That's what I think.
984693
There are a few main checkpoints before cell division which you might be thinking of. \n\nBetween G1 and S, in the middle of the S phase, and between G2 and M, all checking to make sure that any damaged DNA is repaired before replication/division.\n\nThere are also checkpoints during mitosis, for example, between metaphase and anaphase to make sure all chromosomes are attached to spindles.
501668
Mitosis is nuclear division plus cytokinesis, and produces two identical daughter cells during prophase, prometaphase, metaphase, anaphase, and telophase. Interphase is often included in discussions of mitosis, but interphase is technically not part of mitosis, but rather encompasses stages G1, S, and G2 of the cell cycle.  \nInterphase & mitosis Interphase \n  \nThe cell is engaged in metabolic activity and performing its prepare for mitosis (the next four phases that lead up to and include nuclear division). Chromosomes are not clearly discerned in the nucleus, although a dark spot called the nucleolus may be visible. The cell may contain a pair of centrioles (or microtubule organizing centers in plants) both of which are organizational sites for microtubules. \n \nProphase \n  \nChromatin in the nucleus begins to condense and becomes visible in the light microscope as chromosomes. The nucleolus disappears. Centrioles begin moving to opposite ends of the cell and fibers extend from the centromeres. Some fibers cross the cell to form the mitotic spindle. \n \nPrometaphase\n  \nThe nuclear membrane dissolves, marking the beginning of prometaphase. Proteins attach to the centromeres creating the kinetochores. Microtubules attach at the kinetochores and the chromosomes begin moving. \n \nMetaphase\n  \nSpindle fibers align the chromosomes along the middle of the cell nucleus. This line is referred to as the metaphase plate. This organization helps to ensure that in the next phase, when the chromosomes are separated, each new nucleus will receive one copy of each chromosome.\n \nAnaphase\n  \nThe paired chromosomes separate at the kinetochores and move to opposite sides of the cell. Motion results from a combination of kinetochore movement along the spindle microtubules and through the physical interaction of polar microtubules. \n \nTelophase \n  \nChromatids arrive at opposite poles of cell, and new membranes form around the daughter nuclei. The chromosomes disperse and are no longer visible under the light microscope. The spindle fibers disperse, and cytokinesis or the partitioning of the cell may also begin during this stage. \n \nCytokinesis\n \nIn animal cells, cytokinesis results when a fiber ring composed of a protein called actin around the center of the cell contracts pinching the cell into two daughter cells, each with one nucleus. In plant cells, the rigid wall requires that a cell plate be synthesized between the two daughter cells.
791273
Definitely b...\nDuring Interphase, there are 3 subphases - G1, S, and G2.  G1 is for growth of the cell, S is for synthesis of an extra set of chromosomes (amount of DNA in cells), and G2 is for preparation for the rest of cell division.  After interphase is prophase (nuclear membrane dissolves and DNA bundles up), then metaphase (DNA lines up on the center of the cell), anaphase (DNA separates towards poles), and telophase (Cell divides into two cells).  I hope this helps!\n\nAnswer: b. between the G1 and G2 phases of the cell cycle
980704
You would find that many cells spend the majority of the cell cycle in G0/G1 phase as opposed to the actively dividing root tip sections you saw. \n\nPlease visit the link I have provided from the Univ. of Arizona- it describes the Onion Root Tip as well as each phase. This should reinforce some concepts as well.\n\nGood luck!
1138838
I assume you are referring to the centriole, which is found in the nucleus and is responsible for the organization and migration of chromosomes during cell division. They have functions that are not quite understood that allow them to organize and coordinate microtubule assemblies, just like a computer but on a much smaller scale.
463857
well it depend on the species of animal or plant you're studying. in Mammalian cells, The protein mTOR is a serine/threonine kinase that regulates DNA translation and cell division. the availability of a food source for the cell influences mTOR so that when cells are not able to grow to normal size they will not go through cell division. This is just one of the proteins synthesized during different times of a cell cycle to prevent mitosis from occuring. some disrupt the formation of mitotic spindles, some prohibit the cell from going into prophase or metaphase...others work on chemical receptors and hormones released form the cell. google search it, and I hope this has helped :)
913144
between the cell wall and the nucleus.
746150
http://en.wikipedia.org/wiki/Mitosis\nhttp://en.wikipedia.org/wiki/Meiosis\n\nBecause meiosis is a "one-way" process, it cannot be said to engage in a cell cycle as mitosis does. However, the preparatory steps that lead up to meiosis are identical in pattern and name to the interphase of the mitotic cell cycle.