Its cells are not thought to contain mitochondria but do contain genes that are similar to the genes for muscle proteins. state and explain the domain into which these organisms should be classified. 3 main domains are: bacteria, eukarya, archaea.

The domain is Archaea. They are single cell and contain a cell wall with no peptidoglycan. They lack a membrane enclosed nucleus and have a DNA that exist in circular form. Some members of Achaea are able to produce methane. Their distinguishing characteristic unlike Bacteria is that they possess genes and several metabolic pathways related to Eukaryotes.

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the sugar-phosphate backbone forms the structural framework of nucleic acids, including dna and rna. this backbone is composed of alternating sugar and phosphate groups, and defines directionality of the molecule.