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Question: Answered & Verified by Expert
Thermococcus, Methanococcus and Methanobacterium examplify
BiologyBiological ClassificationNEETNEET 2008 (Screening)
Options:
  • A archabacteria that contain protein homologous to eukaryotic core histones
  • B archaebacteria that lack any histones resembling those found in eukaryotes but whose DNA is negatively supercoiled
  • C bacteria whose DNA is relaxed or positively supercoiled but which have a cytoskeleton as well as mitochondria
  • D bacteria that contain a cytoskeleton and ribosomes
Solution:
2728 Upvotes Verified Answer
The correct answer is: archabacteria that contain protein homologous to eukaryotic core histones
Inspection of domain Archaea shows that two sub-divisions exist the Euryarchaeota and the Crenarchaeota. The Archaea are chemotrophic although Halobacterium can use light to make ATP. Many others are chemolithotrophs with hydrogen gas being a widely used energy source. The Euryarchaeota includes Methanobacterium, Methanocaccus, Thermocaccus. The differential features among bacteria, Archaea and Eukarya are:

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