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On this page you are required to add two items (link to a website, video, animation, student-created slide show, student-created PowerPoint presentation) and one journal article pertaining to a topic in this chapter. A one-paragraph summary must accompany each item describing the main idea and how it applies to the lecture topic. Please see the PBWorks help guide for assistance embedding video and other items directly in the page. I will also produce a how-to video on using tables to wrap text around items and other useful tips. Please see the syllabus for organization and grading details.
A. Daily Blog
In this chapter, we learned about the eukaryotic cell. Cytogeneticists examine cells microscopically to determine their chromosome composition. Eukaryotic chromosomes are inherited in sets. A diploid cell has two sets of chromosomes. The members of each pair are called homologues. Haploid cells have one set of chromosomes. The cell cycle consists of four phases: G1, S, G2, and M. The G1, S, and G2 phases are known as interphase. An interaction between cyclin and cyclin-dependent kinase is necessary for cells to progress through the cell cycle. There are checkpoints that make sure that cell replication is working correctly. Mitosis is the process by which a eukaryotic cell separates the chromosomes in its cell nucleus into two identical sets in two nuclei. There are four phases of mitosis: Prophase, Metaphase, Anaphase, and Telophase. After those, cytokinesis occurs, which is the division of the cytoplasm. Meiosis is cell division for sexual reproduction. It begins with diploid cells and becomes four haploid cells. There are two divisions: Meiosis I and Meiosis II.
B. Useful Materials
This is an in depth animation of all the cell cycle proteins that are needed to undergo and regulate mitosis. Some of the proteins include cyclin and CDK's which need to bind together in other to function. Together, they phosphorylate PRB, so the cell can go through cell division. PRB is a growth inhibitor that contains E2F, a protein that is needed to turn on genes needed for the progression of the cell cycle.
This animation is on cell division and it shows different examples of how a cell divides in real life.
Cells technically go through two divisions, nuclear and cytokinesis.
Nuclear Division is when the nucleus divides into two parts.
Cytokinesis is when the cytoplasm divides and forms two new cells.
This article about Deinococcus Radiodurans ("Strange Berry that Withstands Radiation").
This microorganism has widthstanded radiation that can instantly kill a human.
Even though the radiation shatters the DNA of the organism, it can be dead for a few hours and then come back to life as a fully functioning organism. Scientists realized that it put its DNA back together, much like a jigsaw puzzle and enlisted the help of an enzyme called PolA. Nothing really happens until the DNA begins pairing with its other strand and then bonds together to create chromosomes. When this organism recreates its chromosomes, the organism comes back to life. Scientists have yet to find a way to implement such a find into a real medicine but they want to use this idea of cell resurrection to bring back damaged neurons.
Comments (1)
Derek Weber said
at 2:59 am on Apr 2, 2011
That's all we learned?
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