PROKARYOTES

=Prokaryotes:= [image:http://i.imgur.com/7IlUWzb.png] Prokaryotes include bacteria and archea (ancient bacteria). They '''don’t have a nucleus''' but have a single circular DNA that moves freely within the cell. Due to the lack of the nuclear membrane, the ribosome’s can attach directly to the mRNA when it is still being transcribed. Unlike eukaryotes, some prokaryotes '''have plasmids''', small circular DNA, which can replicate independently of the main chromosome and are a useful tool in genetic engineering. '''Prokaryotes lack most of the other organelles found in eukaryotes'''. Prokaryotes are much smaller, simpler organisms and were amongst the first living thing in existence.