R plasmid
R Plasmid
R Plasmid (pronunciation: /ɑːr plæz.mɪd/) is a type of plasmid that contains genes for antibiotic resistance.
Etymology
The term "R Plasmid" is derived from the term "Resistance Plasmid". The "R" stands for "Resistance", referring to the plasmid's ability to confer resistance to antibiotics.
Definition
An R Plasmid is a type of extrachromosomal DNA molecule that is not a part of the genome of the cell but can replicate independently. It carries genes that can provide the host bacteria with resistance to antibiotics. This resistance can be transferred from one bacterium to another through the process of conjugation.
Related Terms
- Plasmid: A small, circular, double-stranded DNA molecule that is distinct from a cell's chromosomal DNA.
- Antibiotic resistance: The ability of a microorganism to withstand the effects of an antibiotic.
- Gene: A unit of heredity that is transferred from a parent to offspring and is held to determine some characteristic of the offspring.
- Conjugation (biology): The direct transfer of DNA from one bacterium to another bacterium via cellular bridge.
See Also
External links
- Medical encyclopedia article on R plasmid
- Wikipedia's article - R plasmid
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