What Information was Used to Identify the Three Domains of Life

Question

What information was used to identify the three domains of life?
A) Sequence of the 16S ribosomal RNA
B) Sequence of the mitochondrial genome
C) Sequence of the cytochrome c gene
D) Chemical structure of the cell wall
E) Chemical structure of phospholipids

Accepted Answer

The sequence of the 16S ribosomal RNA was used to identify the three domains of life (Bacteria, Archaea, and Eukarya). This is because the 16S rRNA is highly conserved across all organisms and can be used to determine evolutionary relationships between different species.

Answer: C
 The sequence of the cytochrome c gene has also been used to determine evolutionary relationships between organisms, but it is not as commonly used as the 16S rRNA.

Answer: D and E
 The chemical structure of the cell wall and phospholipids are important factors in distinguishing between different groups of bacteria, but they are not used to identify the three domains of life.