Title: Difference between Archaebacteria and Eubacteria | KnowsWhy.com
Headings: Difference between Archaebacteria and Eubacteria
Difference between Archaebacteria and Eubacteria
What are Archaebacteria and Eubacteria?
Archaebacteria
Eubacteria
Difference between Archaebacteria and Eubacteria
1. Habitat
Archaebacteria
Eubacteria
2. Structure, size and shape
Archaebacteria
Eubacteria
3. Membrane Lipids
Archaebacteria
Eubacteria
4. Deoxyribonucleic acid (DNA) dependent Ribonucleic acid (RNA) Polymerase
Archaebacteria
Eubacteria
5. Antibiotic sensitivity
Archaebacteria
Eubacteria
6. Introns
Archaebacteria
Eubacteria
7. First amino acid in all proteins
Archaebacteria
Formylmethionine
Eubacteria
Methionine
8. Growth and reproduction
Archaebacteria
Eubacteria
9. Glycolysis/Kreb’s cycle
Archaebacteria
Eubacteria
10. Examples
Archaebacteria
Eubacteria
Conclusion
Author: Dr. Amita Fotedar

Content: Gram-negative bacteria do not possess the ability to absorb violet stain. The reason is that the alcohol used destroys the outer membrane of the gram-negative cells making the cell wall permeable effecting its capability to retain the crystal violet stain. The peptidoglycan layer in gram-negative bacteria is quite thin and appears red or pink as it is present between the inner and outer cell membrane causing the bacteria to take up the counterstain. Gram-positive bacteria are more receptive to antibiotics due to the lack of outer membrane. Figure 2. Structure of a bacterial cell (Doetsch & Sjoblad, 1980)
Difference between Archaebacteria and Eubacteria
1. Habitat
Archaebacteria
These consist of organisms that thrive in extreme conditions (temperature as low as 4 o C and as high as 120 o C) of environment e.g. volcanoes, hot springs, deep ocean vents, salt lakes, marshlands. In human microbiota, they are majorly found in colon, skin membrane and oral cavity. They live in environments that have pH which ranges from 5 to 1. There exist three types of archaebacteria depending upon the habitat preference namely halophiles (microorganisms that thrive in saline conditions), methanogens (bacteria that reduce Carbon dioxide to methane), and thermophiles (microorganisms that survive best at temperatures higher than the normal).