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Biology 2 chapter 11 : the cell cycle
Biology 2 chapter 11 : the cell cycle
Eukaryotic cell organelle essay
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Recommended: Biology 2 chapter 11 : the cell cycle
The two main phases that occur during a cell cycle are interphase and mitosis. During most of a cell cycle, the cell spends a majority of its time in interphase resting in the cell cycle. Within interphase, the cell goes through 3 phases; 2 growth phases and DNA replication. During Interphase the cell goes through its first gap phase (G1). During G1 protein and RNA synthesis occurs so that the cell can grow and mature. (Cooper, Geoffrey M) G1 is very important because it controls the rate at which the cell grows and develops. The phase following G1 is the Synthesis phase (S1). The main component of S1 is DNA synthesis. DNA replicates during this phase so that there will be an excess of chromosomes in the cell. This part of interphase is very important because if the DNA does not replicate as it should, it may result in DNA mutations within the cell. During the last stage of interphase it goes through another gap stage known as Gap 2 (G2). In G2 the cell will grow further and mature. This is a final chance for the DNA to be checked and protein to be synthesized. (Cooper, Geoffrey M). G2 is the final stage prior to the start of Mitosis. Once the three stages of interphase have been complete, mitosis begins. Mitosis is divided into prophase, prometaphase and metaphase, anaphase, and telophase with cytokinesis. During these stages the cell goes through a series of division so that at the end of mitosis the original cell has now been divided into two daughter cells. (Cooper, Geoffrey M) In prophase spindles begin to form inside the cell and centrioles begin to move to opposite sides of the cell. The centrosomes duplicate in the cell and microtubules go through polymerase. In prometaphase microtubules branch out from the centroso...
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....03.2014. http://www.ncbi.nlm.nih.gov/books/NBK9876/
Freeman, W. H. 2000. Regulation of the Eukaryotic Cell Cycle. Molecular Cell Biology. 4th edition. 17.03.2014. Chapter 13 http://www.ncbi.nlm.nih.gov/books/NBK21468/
Heinhorst, Sabine. 31.01.2002. Plant vs. Animal Mitosis. Cell Biology: University of Southern Mississippi. 17.03.2014. http://www.madsci.org/posts/archives/2002-01/1012526835.Cb.r.html
Jacobs, C W. 1998. Mitosis in Plant and Animal Cells. Henry Ford Community College. 17.03.2014. http://sciweb.hfcc.edu/biology/jacobs/bio131/mitosis/mitosis.html
O'Connor, Clare. 2008. Mitosis and Cell Division. Scitable by Nature Education. 17.03.2014. http://www.nature.com/scitable/topicpage/mitosis-and-cell-division-205
Reece, Jane B. 2011 Campbell Biology. 9th edition; International edition. Harlow: Pearson Education, 17.03.2014. pg. 8-10
10.4) In animal cells cytokinesis involves the formation of a cleavage furrow which pinches the cell in two. While in plants cells cytokinesis involves the division of cytoplasm by late telophase, so the daughter cells appear shortly after the end of mitosis.
Miller, K. R., & Levine, J. S. (2010). Miller & Levine biology. Boston, Mass.: Pearson.
3 Leicht B. G., McAllister B.F. 2014. Foundations of Biology 1411, 2nd edition. Southlake, TX: Fountainhead Press. Pp 137, 163-168, 177-180,
Thewessen, J. G. M., Williams, E. M., Roe, L. J. & Hussain, S. T. Nature 413, 277-281.
Compare and Contrast Mitosis and Meiosis. Meiosis and mitosis describes the process by which cells divide. either by asexual or sexual reproduction to produce a new organism. Meiosis is a form of cell division that produces gametes in humans.
The process of mitosis can take place in either a haploid (23 chromosomes) or a diploid (46 chromosomes) cell. Before a cell can be ready for a mitotic division it must primarily undergo its interphase stage. Following the interphase stage several other stages come into play. These stages are prophase, prometaphase, metaphase, anaphase, and telophase. During each specific stage certain sequences of events take place that assist to the completion of the division.
Miller, K. R., & Levine, J. S. (2010). Miller & Levine biology. Boston, Mass: Pearson
Meiosis is a kind of cell division that is the key for sexual reproduction to operate contrary to mitosis, a form of asexual reproduction that serves the purpose of growth, repair, and regeneration of cells. Due to the fact that meiosis produces four non-identical haploid daughter cells, it is of vital importance so to allow variation in a population that provides the foundation for evolution, as it permits a species to adapt to changes in their environment. As I briefly mentioned before, meiosis is separated into two stages – meiosis I and II. These stages are further chara...
Cain, M. L., Urry, L. A., & Reece, J. B. (2010). Campbell Biology. Benjamin Cummings.
... The Web. 4 Feb. 2014. Campbell, Neil A., and Jane B. Reece. Biology.
The process of cell division plays a very important role in the everyday life of human beings as well as all living organisms. If we did not have cell division, all living organisms would cease to reproduce and eventually perish because of it. Within cell division, there are some key roles that are known as nuclear division and cytokinesis. There are two types within nuclear division. Those two types being mitosis and meiosis. Mitosis and meiosis play a very important role in the everyday life as well. Mitosis is the asexual reproduction in which two cells divide in two in order to make duplicate cells. The cells have an equal number of chromosomes which will result in diploid cells. Mitosis is genetically identical and occurs in all living
middle of paper ... ... World Book Inc, 2000. Davis, Lloyd S. and John T Darby. Penguin Biology. San Diego: Academic Press, Inc., 1990.
Campbell, N. A. & J. B. Reece, 8th eds. (2008). Biology. San Francisco: Pearson Benjamin Cummings.
The above information was taken from Biology, Neil Campbell, et. al., New York: Addison Wesley, 1999, p.316.
There are certain things that must happen first before the cell can actually split. There is a six step process required during Mitosis. The first five steps of mitosis are called prophase, prometaphase, metaphase, anaphase, and telophase. This is where all the training and preparation is done for cell division. The sixth step is Cytokinesis, and that is when the cell literally splits into two. Like I said, there are certain things in order to happen before it can enter the M phase. first, it must meet the requirements of the certain size and environment. Since in the S phase the cell duplicated it’s amount of chromosomes it be represented as 2N, where N equals the number of chromosomes in the cell. Cells about to enter M phase, which have passed through S phase and replicated their DNA, have 4N chromosomes. Because of this they are now allowed to enter within the M phase to prophase. Here is where the cell thickens up its chromosomes and begin to sprout microtubules from clone centrosomes. Microtubules tub-like are protein filaments and where the chromosomes migrate but are still within the nuclear envelope in the nucleus. There are centromeres, that are inside the chromosomes and during the later process of this phase, specialized microtubules called kinetochores, assemble on the centromere then later attach to these sites. They act like magnets and go