Thermococcus, Mtehanococcus and Methanobacterium exemplify …

Biology The Living World Previous Year Questions Single Correct MCQ

Published by: CGP EDU Academic Team

Published on: August 11, 2026

Thermococcus, Mtehanococcus and Methanobacterium exemplify :-

Bacteria whose DNA is relaxed or positively supercoiled but which have a cytoskeleton as well as mitochondria

Bacteria that contain a cytoskeleton and ribosomes

Archaebacteria that contain protein homologous to eukaryotic core histones

Archaebacteria that lack any histones resembling those found in eukaryotes but whose DNA is negatively supercoiled.

Text Solution

Verified by Experts

The correct answer is:

• Thermococcus, Methanococcus, Methanobacterium are all extremophilic archaea.

• Their DNA is packaged with histone-like proteins, making it similar to eukaryotic chromatin.

• This is one of the reasons archaea are considered closer to eukaryotes than bacteria, despite being prokaryotic in structure.

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