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.

Question

Quizplus · 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.

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