Circular DNA
# Circular DNA

Circular DNA is DNA that forms a closed loop and has no ends. Examples include:

* Plasmids, mobile genetic elements
* cccDNA, formed by some viruses inside cell nuclei
* Circular bacterial chromosomes
* Mitochondrial DNA (mtDNA)
* Chloroplast DNA (cpDNA), and that of other plastids
* Extrachromosomal circular DNA (eccDNA)
