Question

Why are there no gram-positive archaea species, but there are gram-positive bacteria species?

A.
Archaea lack peptidoglycan.
B.
Archaea do not have a cell membrane.
C.
Archaea lack chitin.
D.
Archaea do not have a cell wall.

Answer 1

Answer: A

Explanation: Archaea possess a broader range of cell envelope structural formats than eubacteria and their cell walls do not contain peptidoglycan. Some archaea have only a single S-layer as their cell wall whereas others have multiple layers.

Answer 2

The correct option is: A. "Archaea lack peptidoglycan" in the walls of the cell. Peptidoglycan is a polymer of sugar and amino acids which forms a layer around the "plasma membrane" of bacteria.

Step-by-step explanation:

• This however does not mean that archaea lack cell wall. Archaea have cell walls that are similar to gram negative bacterial cell walls.

• Archaea are species that give a negative response to gran staining technique. Therefore, there are no gram positive archaea species. The cells walls in archaea may be of several different types of cell walls.