Question

Which of the following is/ are true about archaea?

A) They share histone and some other features with eukaryotes features that are absent in bacteria.

B) They include only methanogens and species that live extremely hot or extremely salty habitats.

C)They are currently accepted as a monophyletic group, sister to eukaryotes.

D) They are prokaryotes and superficially resemble bacteria.

Answer 1

Answer:

A) They share histone and some other features with eukaryotes features that are absent in bacteria.

D) They are prokaryotes and superficially resemble bacteria.

Explanations:

Archaea are the prokaryotes that have a similarity strongly resembling with eukaryotic histones at both the primary sequence level and in a three-dimensional structure. The prokaryotic Archaea and eukaryotes also share other features of eukaryotes like that of transcription which is absent in the Bacteria.

The prokaryotic Archea superficially resemble bacteria, such as a circular genome and the absence of a nucleus, at the genetic level. The other options are false as archaea can survive in most of the environmental conditions and they are not currently accepted as a monophyletic group.