NEET BIOLOGY

Detailed explanation-1: -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-2: -Cell walls: virtually all bacteria contain peptidoglycan in their cell walls; however, archaea and eukaryotes lack peptidoglycan. Various types of cell walls exist in the archaea. Therefore, the absence or presence of peptidoglycan is a distinguishing feature between the archaea and bacteria.

Detailed explanation-3: -Thus, the correct answer is ‘They have some novel features absent in other prokaryotes and eukaryotes.

Detailed explanation-4: -Archaebacteria has a well-defined cell wall that is not made of peptidoglycans like its eubacterial counterpart. The cell wall is composed of various polysaccharides (polymers of sugar molecules like glucose) and proteins. It provides rigidity and protection from the harsh outer environment.

Detailed explanation-5: -Their cell wall lacks peptidoglycan.