Question

Consider the following statements regarding characters of Archaebacteria that they share with eukaryotes:
i) The cell wall does not contain peptidoglycan.
ii) DNA associated with histone.
iii) Translation initiated with formylated methionine.
iv) RNA polymerase similar to eukaryotic RNA polymerase II
v) ATPase similarity
vi) Similar DNA replication and repair

How many of the above characters Archaebacteria share with eukaryotes?
A) 3
B) 4
C) 5
D) 6

Answer 1

Hint: Archaebacteria are single celled prokaryotic organisms which lack a nucleus. They are considered as an ancient form which has evolved from cyanobacteria. They belong to kingdom Monera and are characterised as bacteria.

Complete answer:
To answer this question, we must know about the features of the Archaea.
>They are classified both as bacteria and eukarya. The important distinctive features of Archaea are
>Cell walls lack peptidoglycans unlike bacteria. Rather the cell wall is made up of pseudopeptidoglycan and glycoproteins. (Correct)
>DNA present in Archaea and eukaryotes is associated with histones. (Correct)
>The translation is initiated with the methionine in Archaea and eukaryotes. In bacteria it initiates with formal methionine. (Incorrect)
>RNA polymerase is not similar in both archaea and eukaryotes. (incorrect)
>ATPase is similar in both archaea and eukaryote.(correct)
>DNA repair is dissimilar.(incorrect)

Thus the correct answer is option (A).

Note:The reproduction in Archaea takes place by asexual methods like binary fission, fragmentation, and budding. They undergo normal cell cycles to grow and develop. They split into two on maturity i.e. after attaining a certain size. Archaea are both autotrophic and heterotrophic