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Compare and Contrast the structure and function of Prokaryote and Eukaryote cells

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´╗┐Nashya Fareed Eukaryotic and Prokaryotic Cells 23-sept-12 ________________ Compare and Contrast the structure and function of Prokaryote and Eukaryote cells: All living things are made of cells, and cells are the smallest units that can be alive. Life on earth is classified into five kingdoms, and they each have their own characteristic kind of cell. However the biggest division is between cells of the Prokaryote kingdom (the bacteria) and those of the four kingdoms (animals, plants, fungi and protoctista) which are all Eukaryotic cells. Prokaryotes were the only form of life on Earth for millions of years until more complicated eukaryotic cells came into being through the process of evolution. ...read more.


From the table we can also see that not only do prokaryotes have no membrane-bound organelles, but they are also much simpler, with far fewer organelles. However looking at the cell size we can see that prokaryotic cells are easily 10 to 100 times smaller than eukaryotic cell, which can perhaps explain why they are so simple in comparison to the eukaryotic cells. All eukaryotic cells have within them a functionally interrelated membrane system, the endomembrane system consisting of the nuclear envelope, ER and Golgi apparatus, vesicles and other organelles derived from them, and the plasma membrane. Many materials are moved around the cell by the endomembrane system, including some proteins. ...read more.


4. Ribosome?s, the organelles on which protein synthesis takes place Endosymbiosis As I have mentioned in the first paragraph: Prokaryotic cells are far older and more diverse than eukaryotic cells. Prokaryotic cells have probably been around for 3.5 billion years, while eukaryotic cells arose only about 1 billion years ago. It is thought that eukaryotic cell organelles like nuclei, mitochondria and chloroplasts are derived from prokaryotic cells that became incorporated inside larger prokaryotic cells. This idea is called endosymbiosis, and is supported by these observations: 1. Organelles contain circular DNA, like bacteria cells. 2. Contain 70S ribosome?s, like bacteria cells. 3. Organelles have double membranes, as though a single-membrane cell had been engulfed and surrounded by a larger cell. 4. Organelles reproduce by binary fission, like bacteria. 5. Organelles are very like some bacteria that are alive today. ________________ | Page ...read more.

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