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:

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.

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.