In the Domains of Life, Archaea and Bacteria Differ from Each

Question

In the domains of life, archaea and bacteria differ from each other in that
A) archaea contain membrane-bound organelles, bacteria do not.
B) bacteria can be extreme thermophiles, archaea cannot.
C) archaea contain ester-linked membrane fatty acids, bacteria do not.
D) bacteria start protein production with formylmethionine, archaea do not.
E) bacteria have introns, archaea do not.

Accepted Answer

Archaea and bacteria differ in their mechanism of initiating protein synthesis. Bacteria start protein synthesis with a modified amino acid, formylmethionine, whereas archaea, similar to eukaryotes, start with methionine. This is a fundamental difference in their molecular biology.