Question

What do Bacteria have in common with Archaea but not with Eukarya?

A) peptidoglycan cell walls
B) DNA associated with histone proteins
C) absence of nucleus
D) unicellular structure
E) transcription mechanism begins with formylmethionine

Answer 1

Bacteria and Archaea share the absence of a nucleus, which distinguishes them from Eukarya. They have different cell wall compositions, with Bacteria having peptidoglycan and Archaea not.

Step-by-step explanation:

Bacteria and Archaea both belong to the domain of prokaryotic organisms, which means they share certain features. One key similarity Bacteria have with Archaea, but not with Eukarya, is the absence of a nucleus (C). Both Bacteria and Archaea have their genetic material freely floating in a nucleoid region within the cell, unlike eukaryotic cells which house their DNA within a membrane-bound nucleus. Another distinction is that while the cell walls of Bacteria contain peptidoglycan, Archaea do not have peptidoglycan in their cell walls. Instead, the cell walls of Archaea may consist of substances like pseudomurein or other polymers. Also, the plasma membrane of Bacteria is composed of fatty acid-based lipids, whereas Archaea have unique lipids called phytanyl groups in their membranes.