Editing Chromosome (section)

=== Structure in sequences ===
Prokaryotic chromosomes have less sequence-based structure than eukaryotes. Bacteria typically have a one-point (the [[origin of replication]]) from which replication starts, whereas some archaea contain multiple replication origins.<ref>{{cite journal | vauthors = Kelman LM, Kelman Z | title = Multiple origins of replication in archaea | journal = Trends in Microbiology | volume = 12 | issue = 9 | pages = 399–401 | date = September 2004 | pmid = 15337158 | doi = 10.1016/j.tim.2004.07.001 }}</ref> The genes in prokaryotes are often organized in [[operon]]s and do not usually contain [[intron]]s, unlike eukaryotes.