NEET Previous Year Question
Thermococcus, Mtehanococcus and Methanobacterium exemplify :-
Topic: NEET PYQ
Answer: C. Full step-by-step solution below.
- ABacteria whose DNA is relaxed or positively supercoiled but which have a cytoskeleton as well as mitochondria
- BBacteria that contain a cytoskeleton and ribosomes
- CArchaebacteria that contain protein homologous to eukaryotic core histones
- DArchaebacteria that lack any histones resembling those found in eukaryotes but whose DNA is negatively supercoiled.
Correct answer: C
Solution
(c) • 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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