What is the difference between Arcaea and Bacteria???

Question

Help!!! :-(

Answer 1

Members of the Archaea are prokaryotes, as are bacteria however, some genes of some Archaea have introns like Eukaryotes.

http://www.fp.ucalgary.ca/group2introns/...

Archaea share antibiotic sensitivities with eukaryotes they do not share with bacteria

http://student.ccbcmd.edu/courses/bio141...

http://www.jstor.org/pss/121887

They differ from both bacteria and eukarya by having branched hydrocarbon chains attached to glycerol by ether linkages in their membranes.

"Of 27 distinguishing characteristics listed in Brock and Madigan 2000, Bacteria and Archaea share 15, Eukaryotes and Archaea share 8, whilst Bacteria and Eukaryotes share only 3"

http://www.earthlife.net/prokaryotes/arc...

Archaea have RNA polymerase subunits as well as certain transcription factors not found in bacteria.

http://www.bacterialphylogeny.info/archa...

"Bacteria do not have histones but Archaea do"

http://www.pubmedcentral.nih.gov/article...

Answer 2

Like bacteria, archaea are prokaryotes, and they resemble bacteria morphologically.  There are a number of biochemical differences, including:

1.  Plasma membranes.  The phospholipids in the plasma membranes of archaea contain repeating isoprene subunits which are attached to glycerol by ether linkages.  The phospholipids in the plasma membranes of bacteria contain straight carbon chains, which are attached to glycerol by ester linkages.

2.  Cell wall.  This is made up of peptidoglycan for bacteria.  Archaea have various types of cell walls, none of which contain peptidoglycan.

3.  RNA transcription.  This resembles transcription in eukaryotes more closely than transcription in bacteria.