Extrachromosomal DNA is any DNA that is found outside of the nucleus of a cell. It is also referred to as extranuclear DNA or cytoplasmic DNA. Most DNA in an individual genome is found in chromosomes but DNA found outside of the nucleus also serves important biological functions. In prokaryotes, nonviral extrachromosomal DNA is primarily found in ...
DNA that occurs naturally outside of the nucleus (e.g., mitochondrial DNA). ... (05 Mar 2000) ... 
Type: Term Definitions: 1. DNA that occurs naturally outside of the nucleus (mitochondrial DNA).
additional molecules of DNA distinct from the chromosomes that are also part of the cell’s genome