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Archaea and Bacteria are separated into two different DOMAINS because of the differences in DNALocomation

Question

Archaea and Bacteria

Archaea and Bacteria are separated into two different DOMAINS because of the differences in DNA Localization.

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Solution

Archaea and Bacteria are separated into two different domains primarily because of the differences in their genetic sequences and the structure of their cellular machinery, not locomotion.

  1. DNA: The DNA sequences of Archaea and Bacteria show significant differences. The genetic code of Archaea is more similar to Eukaryotes (organisms whose cells have a nucleus enclosed within membranes) than it is to Bacteria.

  2. Cellular Machinery: The machinery used by these two domains for reading and expressing their DNA (transcription and translation) also differs. For example, the ribosomes of Archaea are more similar to those of Eukaryotes than to Bacteria.

  3. Cell Membrane: The composition of their cell membranes is also different. Bacteria have a peptidoglycan cell wall, while Archaea have a variety of cell walls but none of them contain peptidoglycan.

  4. Lipids: The lipids in the cell membranes of Archaea are unique and different

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