Video Transcript
Which of the following correctly
describes the difference between the cell walls of Archaebacteria and
Eubacteria? (A) Eubacteria have cell walls that
are composed of peptidoglycan, which is not present in Archaebacteria cell
walls. Or (B) Archaebacteria have cell
walls that are composed of peptidoglycan, which is not present in Eubacteria cell
walls.
As you may recall, Archaebacteria
and Eubacteria are both prokaryotic organisms that belong to the kingdom Monera. Prokaryotes are unicellular
organisms that all share some distinct characteristics. For example, unlike eukaryotes,
prokaryotic cells do not contain a membrane-bound nucleus. They also have a cell wall, but
this differs from the cell wall found in some eukaryotes, as it does not contain
cellulose.
However, there are some notable
differences between Archaebacteria and Eubacteria that can help us distinguish
between the two. For example, Eubacteria, which are
also known as true bacteria, have cell walls that are largely composed of the
polymer peptidoglycan. On the other hand, Archaebacteria
have cell walls that are formed from the linking of other polymers and generally do
not contain peptidoglycan.
Therefore, the statement that
correctly describes the difference between the cell walls of these two groups is
(A). Eubacteria have cell walls that are
composed of peptidoglycan, which is not present in Archaebacteria cell walls.
