Archaea H. salinarum

This model allows you to study the structure of the archae on the example of Halobacterium Salinarum, which is a halobacteria, which means that it survives in critical high salt concentrations. Archaei is a group of organisms that were initially considered bacteria due to their physical similarity. A more reliable genetic analysis showed that Archaei differ from both bacteria and eukaryotes, thanks to which they received their own domain in three classifications. They are as well as bacteria are prokaryotes, but they contain different lipids in the membranes of their cells. There are no peptidoglycan in their cell walls, the ribosomal structure is more similar to eukaryotic ribosomes than on the structure of bacteria. Archai same size as bacteria. They are as well as bacteria have ring DNA, but the DNA replication begins with several points and then they have several RNA polymerazs, unlike bacteria that they have in one instance. Archaei was originally isolated from extreme media, such as high estection places, salt or heat, for which they were called "Extremes". Recently, they were found in ordinary places rich in bacteria: the surface waters of the ocean, in the human body, soil and others.