How Do Archaeans and Bacteria Differ

Question

How do archaeans and bacteria differ?  
A) Size
B) Shape
C) Plasma membrane composition
D) Absence of a nucleus
E) Mode of cellular division

Accepted Answer

Archaeans and bacteria differ primarily in their plasma membrane composition. Archaeans have a unique lipid layer that is ether-linked, while bacteria have a peptidoglycan cell wall and their membrane lipids are ester-linked.