Chromosomal ring of DNA

Eukaryotic cell Prokaryotic cell

Plasmid (ring of DNA)

50 x Smaller 0.2-2μm

50 x Bigger 10-100μm

And small rings of DNA called plasmids

Inside a nucleus

Main differencesProkaryotes:

• SIZE – 50 x smaller than eukaryotes

• Have no membrane bound sub-cellular structures

• Bacteria do not have a nucleus. They do have two types of DNA – plasmid and chromosomal. The chromosomal DNA carries most of the genetic information. Plasmid DNA forms small loops and carries extra information