Domain. 1. When referring to an Internet address or name a domain or domain name is the location of a website. For example, the domain name computerhope.com points to the IP address 69.72.169.241, but it is generally easier to remember a name rather than a long string of numbers.omain. 1. When referring to an Internet address or name a domain or domain name is the location of a website. For example, the domain name computerhope.com points to the IP address 69.72.169.241, but it is generally easier to remember a name rather than a long string of numbers.
They are most commonly found in bacteria as small, circular, double-stranded DNA molecules; however, plasmids are sometimes present in archaea and eukaryotic organisms. In nature, plasmids often carry genes that may benefit the survival of the organism, for example antibiotic resistance.he normal number of copies of plasmid that may be found in a single cell is called the copy number, and is determined by how the replication initiation is regulated and the size of the molecule. Larger plasmids tend to have lower copy number.
Plasmid purification is a technique used to isolate and purify plasmid DNA from genomic DNA, proteins, ribosomes, and the bacterial cell wall. A plasmid is a small, circular, double-stranded DNA that is used as a carrier of specific DNA molecules.lasmids are circular, extra chromosomal, DNA molecules and in molecular biology they act as carriers, or vectors, for a specific DNA fragment. Bacteria are used to replicate plasmids, so that your DNA of interest is mass-produced.