Archaea usually have a single circular chromosome, with as many as 5,751,492 base pairs in Methanosarcina acetivorans, the largest known archaeal genome.
Arkea biasanya memiliki kromosom melingkar tunggal, ukuran yang mungkin sebesar 5.751.492 pasangan basa di Methanosarcina acetivorans, genom arkea terbesar yang diketahui.