Answer :
Bacteria are microbes with a cell structure simpler than that of many other organisms. Their control centre, containing the genetic information, is contained in a single loop of DNA. Some bacteria have an extra circle of genetic material called a plasmid rather than a nucleus.
A competent strain of bacteria is injected with the DNA (often in the form of a plasmid) during transformation so that the bacteria can reproduce the desired sequence in numbers adequate for additional research and/or modification. A recombinant plasmid that has been inserted into a bacterial cell causes the cell to start expressing the genes on it. By employing the bacterial cell's machinery, DNA polymerase finds the ori- the origin of replication- and begins to duplicate the plasmid. A fundamental molecular biology approach is the heat shock method of transforming plasmid DNA into E. coli. It involves putting an alien plasmid or ligation product inside of bacteria.
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