Eubacteria - Research Article from Macmillan Science Library: Genetics

This encyclopedia article consists of approximately 7 pages of information about Eubacteria.
This section contains 1,840 words
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Structure

Like archeans, eubacteria are prokaryotes, meaning their cells do not have nuclei in which their DNA is stored. This distinguishes both groups from the eukaryotes, whose DNA is contained in a nucleus. Despite this structural resemblance, the Eubacteria are not closely related to the Archaea, as shown by analysis of their RNA (see below).

Eubacteria are enclosed by a cell wall. The wall is made of cross-linked chains of peptidoglycan, a polymer that combines both amino acid and sugar chains. The network structure gives the wall the strength it needs to maintain its size and shape in the face of changing chemical and osmotic differences outside the cell. Penicillin and related antibiotics prevent bacterial cell growth by inactivating an enzyme that builds the cell wall. Penicillin-resistant bacteria contain an enzyme that chemically modifies penicillin, making it ineffective.

Some types of bacteria have an additional layer outside the cell...

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This section contains 1,840 words
(approx. 7 pages at 300 words per page)
Buy the Eubacteria Encyclopedia Article
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Macmillan Science Library: Genetics
Eubacteria from Macmillan Science Library: Genetics. Copyright © 2001-2006 by Macmillan Reference USA, an imprint of the Gale Group. All rights reserved.
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