Definition of Plasmid
1. Noun. A small cellular inclusion consisting of a ring of DNA that is not in a chromosome but is capable of autonomous replication.
Definition of Plasmid
1. Noun. (cytology) A circle of double-stranded DNA that is separate from the chromosomes, and which is found in bacteria and protozoa. ¹
¹ Source: wiktionary.com
Definition of Plasmid
1. a hereditary structure of a cell [n -S]
Medical Definition of Plasmid
1.
A small, independently replicating, piece of extrachromosomal cytoplasmic DNA that can be transferred from one organism to another. Linear or circular DNA molecules found in both pro and eukaryotes capable of autonomous replication.
Stringent plasmids occur at low copy number in cells, relaxed plasmids at high copy number, ca 10 to 30. Plasmids can become incorporated into the genome of the host or can remain independent. An example is the f factor of E. Coli. May transfer genes and plasmids carrying antibiotic resistant genes can spread this trait rapidly through the population.
Described largely from bacteria and protozoa. Some plasmids are capable of integrating into the host genome. A number of artificially constructed plasmids are used as cloning vectors.
(14 Oct 1997)
Lexicographical Neighbors of Plasmid
Other Resources:
Arabic