NEET BIOLOGY

BIOLOGICAL CLASSIFICATION

KINGDOM MONERA

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
The exact difference between the cell walls of archaebacteria and eubacteria is ____
A
Archaebacteria cell walls are composed of peptidoglycan while eubacteria cell walls are not composed of peptidoglycan
B
Archaebacteria cell walls are composed of carbohydrate and protein polymers while eubacteria cell walls are composed of lipid or fat polymers
C
archaebacteria cell wall is not composed of peptidoglycan while eubacteria cell wall is composed of peptidoglycan
D
Archaebacteria cell walls are thick while eubacteria cell walls are thin
E
archaebacteria cell wall is permeable or can be passed by any substance while eubacteria cell wall is semipermeable or can only be passed by certain substances
Explanation: 

Detailed explanation-1: -The key difference between archaebacteria cell wall and eubacteria cell wall is the lack of muramic acid and D-amino acids in the cell wall of archaebacteria. Also, there are some other structural and chemical composition differences among the cell wall of these two groups.

Detailed explanation-2: -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.

Detailed explanation-3: -Like Eubacteria, Archaea contain a cell wall composed of various polysaccharides and glycoconjugates. Archaea lack peptidoglycan, but they still form rigid cell boundaries that confer resistance to high internal osmotic pressure.

Detailed explanation-4: -Eubacteria are enclosed by a cell wall. The wall is made of cross-linked chains of peptidoglycan, a polymer that combines both amino acid and sugar chains. The network structure gives the wall the strength it needs to maintain its size and shape in the face of changing chemical and osmotic differences outside the cell.

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