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They are useful in metal mining and some recycling, but other than that biofilms can be quite harmful. They cause dental plaque, grow on surgical supplies, implants and water.


E. coli grows well on many types of media; I personally used Tryptone with NaCl. Many labs use E. coli for teaching purposes because it is not pathogenic and low maintenance.


Addition to Chris' answer. If you do not have a strain that doesn't produce biofilm then you would have to screen for the genes that are involved in biofilm production (this goes for any phenotype). In earlier times people used to do this by random mutagenesis with mutagens such as EMS (Ethyl Methanesulphonate) or UV. Nowadays it is possible to build a ...


You could do different things: First you could, as you say yourself, sequence the complete genomes of the strains from a biofilm and compare these with some, which do not form biofilms. This may give you an idea which genes are involved when they are present in the "biofilm genome" but not in the other. The proof would be to disrupt these genes either by ...


You probably mean genomic and non-genomic DNA - Plasmids are small rings of non-genomic double-stranded DNA in Bacteria. They replicate mostly indepently of the genomic DNA can can occur from a few to several hundred copies per cell. See the illustration from the Wikipedia:


No, as @GriffinEvo already mentioned, bacteria are one of the main kingdoms of life:                          The Bacteria and Archaea are all unicellular organisms (though there are strange Archea like the Pyrodictium genus that are ...


No, many unicellular organisms are not bacteria. Examples include (but certainly not limited to); some fungi, chlorella algae, and archaea. Bacteria are one of three domains in the classification of life. You can find more about the bacteria domain at the wikipedia page (It's a long and complex history which is hard to summarise here) and about the domains ...

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