title: Circular DNA
text: # 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)
  