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Chapter: Medical Microbiology: An Introduction to Infectious Diseases: Bacterial Structures

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Core - Bacterial Structures

In contrast to the structural richness of the layers and appendages of the cell envelope, the interior seems relatively simple in transmission electron micrographs of thin sections of bacteria.

CORE

In contrast to the structural richness of the layers and appendages of the cell envelope, the interior seems relatively simple in transmission electron micrographs of thin sections of bacteria (Fig 2 – 13). There are two clearly visible regions, one granular (the cytosol) and one fibrous (the nucleoid). In addition, many bacteria possess plasmids that are usually circular, double-stranded DNA bodies in the cytosol separate from the larger nucleoid; plasmids are too small to be visible in thin sections of bacteria.





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