NEET 2008
- Exam
- NEET
- Year
- 2008
- Subject
- Botany
- Chapter
- Biological Classification
NEET 2008 · Botany · Biological Classification
Thermococcus, Methanococcus and Methanobacterium examplify
Thermococcus, Methanococcus and Methanobacterium examplify
Options
- Aarchabacteria that contain protein homologous to eukaryotic core histones
- Barchaebacteria that lack any histones resembling those found in eukaryotes but whose DNA is negatively supercoiled
- Cbacteria whose DNA is relaxed or positively supercoiled but which have a cytoskeleton as well as mitochondria
- Dbacteria that contain a cytoskeleton and ribosomes
Correct answer
A. archabacteria that contain protein homologous to eukaryotic core histones
Step-by-step solution
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: