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Microbial Variety. Introduction It is simply astonishing when considering
the great diversity of prokaryotes that surrounds us. The ...
... Through the next several decades, the biosensor technology took off radically as
a variety of new ... Microbial biosensors are another major class of biosensors. ...
... is the priciest way to compare complete sequences, in order for microbial genome
sequencing ... published a review in 2001 of a variety of new genome comparison ...
... By using a complex medium which contains a variety of ingredients at different
concentrations, you run the risk of enriching the wrong microbial species. ...
... After initial isolation a variety of techniques can be implemented to analyze and ...
in order to determine the difference between two main microbial cell wall ...
Submitted by dsug27 on February 12, 2008
Category: Miscellaneous
Words: 1557 | Pages: 7
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Introduction
It is simply astonishing when considering the great diversity of prokaryotes that surrounds us. The most common of these simple types of organisms that do envelop us at the bacterial level are Archaebacteria and Eubacteria. They are also the smallest cells described during this laboratory. Although their sizes vary widely, the largest ones reach the dimensions similar to those of some eukaryotic protists. Bacteria (currently referred to as Eubacteria) are composed of Gram-positive and Gram negative families, reflecting the presence of either a thick peptidoglycan cell wall or a thin peptidoglycan cell wall surrounded by an outer membrane (Joset and Guespin-Mitchel 1993).
Another exceedingly important distinguishing feature of the prokaryote as compared to the eukaryote is the lack of membrane bound organelles inside the cell. The name Prokaryote comes from old- Greek pro meaning before + karyon meaning nut, referring to the cell nucleus, + suffix -otos, pl. -otes; also spelled (procaryotes") (Wikipedia, 2005). According to Dr. Harris prokaryotes also differ from the more complex eukaryotes by not only the way they build their ribosomes, but also sexual reproduction which is mostly asexual. No meiosis or mitosis happening here, only reproduction by fission. Nevertheless bacteria are very effective "chemical machines"(Dr. Harris 2005).
While some bacteria are heterotrophic, others are saprophytic, parasitic, pathogenic, and even pathogenic. This gives you an idea how diverse bacteria are.
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Studying Microbial Diversity is of great interest to us for many reasons. Because prokaryotes are found in nearly all environments on earth, understanding these bacteria is crucial to each and every organism on this planet. Archaea in...
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