Structure - Structure

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Structure Until light microscopes with better lenses and electron microscopes with higher magnifying  capabilities were developed, microbiologists knew little about the structure and considerably more  about the chemistry of the organisms they studied. A typical bacterial cell is illustrated in  Figure 1   with  the major features named. The cell is most of the features found in eukaryote cells.  When growth conditions become unfavorable—when nutrients become scarce, for example, or the  environment dries—many bacteria produce  endospores  adding thick walls around the circular DNA  together with a bit of cytoplasm. The spores resist high temperatures, desiccation, chemical  disinfectants, ultraviolet radiation, X-rays, boiling for several hours and are the reason bacteria  sometimes survive even in “sterile” hospital environments.  Bacteria are basically unicellular with simple shapes: short rods or 
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This note was uploaded on 11/14/2011 for the course BIO 1421 taught by Professor Farr during the Fall '08 term at Texas State.

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