Q2. What are the general characteristics of most prokaryotes? Explain how Archea represents a unique branch of prokaryotic evolution. 1. Small, ranging from 0-5 micrometers. 2. Some bacteria produce a slimy capsule made of carbohydrate that surrounds the cell wall and protects the bacterial cell from being engulfed by white blood cells. 3. Movement by a stiff, inflexible, rod like structure called a flagellum. 4. Prokaryotic cells are not able to join to form tissues. 5. Present in most prokaryotic cells, the cell wall is an important structure providing shape to the cell and protecting it against water-pressure damage. Thus, most prokaryotes plasmolyze in hypertonic environments. 6. The cytoplasm of prokaryotes does not have a complex, fine structures. It is highly granulated due to the presence of a large number of ribosomes, which ware usually the only cellular organelles. 7. The cell membrane pushes inward causing a pocket known as a mesosome.
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This note was uploaded on 08/04/2008 for the course BIOL 101 taught by Professor Hogan during the Fall '08 term at UNC.