Practice question

Kinetoplast represents highly specialized mitochondrial nucleoid unique to kinetoplastids defining order. Composed of catenated circular DNAs: 20-50 maxicircles encoding canonical mitochondrial proteins like cytochrome oxidase and NADH dehydrogenase, plus thousands of minicircles encoding guide RNAs for extensive RNA editing of maxicircle transcripts. This network resides within single large mitochondrion near flagellar base, linked to basal body via tripartite attachment complex. It is not nuclear, plastid or plasmid genome but authentic mitochondrial DNA condensed into disk-shaped inclusion, providing molecular marker. Editing requires hundreds of guide RNAs, illustrating extraordinary mitochondrial genetic complexity unique among eukaryotic protists examined.