NEET Botany Biological Classification Questions Solved

NEET - 2008

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?

(1) Archaea resemble eukarya in all respects

(2) Archaea have some novel features that are absent in other prokaryotes and eukaryotes

(3) Archaea completely differ from both prokaryotes and eukaryotes

(4) Archaea completely differ from prokaryotes

Audio Explanation:

(2) The term archaebacteria refers to the ancient origin of this group of bacteria, which seems to have diverged very early from the eubacteria. 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 sturcture than those in all other organisms.

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