Question

In the light of recent classification of living organisms into three domains of life (bacteria, archaea and eukarya), which one of the following statement is true about archaea?

• A. Archaea resembles eukarya in all respects
• B. Archaea have some noble features that are absent in other prokaryotes and eukaryotes
• C. Archaea completely differ from both prokaryotes and eukaryotes
• D. Archaea completely differ from prokaryotes

Answer 1

The correct option is B Archaea have some noble features that are absent in other prokaryotes and eukaryotes

All archaebacteria share certain key characteristics

(i) Their cell wall lack peptidoglycan (important component of cell wall of eubacteria).

(ii) Lipids in cell membrane of archaebacteria have different structure than those in all other organisms.

(iii) Archaebacteria have distinct ribosomal RNA sequence.

(iv) Some genes of archaebacteria possess, introns unlike those of other bacteria.