prokaryotic

Prokaryotes are microbial cells lacking a nuclear membrane. Eukaryotes are cells whose nuclear material is enclosed by a nuclear membrane.

The Eubacteria of Kingdom Monera, commonly called bacteria:
1. Prokaryotic organisms without a nuclear membrane
2. Eubacterial rRNA and no introns in genome
3. Membrane lipids are primarily diacyl glycerol ethers
4. Cell walls contain thick (gram+) or thin layers of peptidoglycan (gram-)

The Archaea, or Archaeobacteria
1. Prokaryotic organisms without a nuclear membrane
2. Archaeobacterial rRNA -- introns in genome
3. Membrane lipids are unusual -- primarily isoprenoid glycerol diether or diglycerol tetraether derivatives
4. The cell wall does not contain peptidoglycan (gram-)

There are three groups of Archaea, which also called extremophiles: Methanogens are poisoned by O2, Thermophiles live in extreme temperatures, and Halophiles live in highly saline environments

Prokaryote structure : Prokaryote taxonomy & phylogeny : Eubacteria and Archaea : Eubacteria : The Archaea : Virtual Cell Textbook - Cell Biology : Main page of BioChemistry : Main page of Molecules : Main page of Pathways : Main page of Genes : Main page of Cell : Main page of Cell to Cell : Main page of Neuron: Main page of Brain: