Monday, November 3, 2008

e coli bacteria

1. the 7 main differences between bacteria and eukaryotic cells are:

internal compartmentalization-no nucleus


cell size- most bacterial cells are small


multicellularity- all bacteria are single cells


chromosomes- consists of a single circular piece of DNA.



reproduction- reproduce by binary fission.



flagella- simple structures composed of a single fiber.



metabolic diversity- bacteria perform several different kinds of anaerobic and aerobic processes.


2.



Spirillum



Bacillus
Coccus


3. Bacteria can have two types of cell walls, distinguished by a dye staining technique, called the Gram stain. The two groups differ in their susceptibility to different antibiotics.


4. Conjugation is a process in which two organisms exchange genetic material.


5.
cell structure- it has no organelles and its genetic material is not enclosed.
it moves on its own, by rotating its slender whiplike flagella.
most bacteria reproduce by binary fission, a process by which a single cell divides into two identical new cells.

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