Bacteria are some of the smallest and simplest cells. A somewhat rigid cell wall supports the cell and surrounds the plasma membrane, which regulates transport into and out of the cell. Ribosomes, protein assembly sites, are dispersed throughout the cytoplasm. Bacterial flagella (without a 9+2 array) provide movement. Pili on the cell surface help bacteria attach to surfaces and to one another.
The Cells Alive web site has an interesting page on the bacteria that cause stomach ulcers. You do not need to click on any of the links on this page.
This animation (Audio - Important) describes the structure of bacteria.
Review what we've covered today, by taking a look at the plant cell in the Eukaryotic Cell tutorial . Don't forget to look at the quiz. (Note: I had to download a new version of Shockwave Player to get this to load: http://get.adobe.com/shockwave/ )
REVIEW: Unlike eukaryotic cells, prokaryotic cells _____ .
REVIEW: Prokaryotes
a. have DNA regions.
b. are unicellular.
c. have cell walls.
d. are bacteria.
e. all of these
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