What's the difference between Domain Bacteria and Domain Archaea?

Question

My text book doesn't say :(

Answer 1

There are a number of differences:

- they have a different cell wall structure - bacteria have peptidoglycan, and archaea do not.

- archaea have a "eukaryotic-type" (80S) ribosome structure, while bacteria have a 70S ribosome.

- archaea have ether lipids in their cell membranes, instead of ester lipids (which bacteria and eukaryotes use)

- archaebacterial flagellae are distinct from bacterial flagellae (archaebacterial flagellae evolved from type IV pili, while bacterial flagellae evolved from type III secretases)

- the subunit structure of RNA polymerase in archaea is different from bacteria.