Question

Living beings have been divided into the three domains. What is true of archaea ?

• A. It has novel features absent in prokaryotes and eukaryotes
• B. Completely different from prokaryotes and eukaryotes
• C. Resembles eukaryotes in all respects
• D. Completely differ from prokaryotes

Answer 1

The correct option is A It has novel features absent in prokaryotes and eukaryotes

Novel features

Archaea has some unique features that are different from prokaryotes and eukaryotes.

These include -

• Absence of peptidoglycan cell wall unlike true bacteria
• Presence of characteristic tRNA and ribosomal RNAs that are very different from true bacterial rRNA or tRNA
• Lipids in the cell membrane of archaea are arranged in a single layer.
• The cell membrane is composed of branched hydrocarbon chains attached to glycerol.
• This is unlike other prokaryotes as well as eukaryotes.