NEET BIOLOGY

Detailed explanation-1: -Archaebacteria differs from eubacteria only in the cell membrane. The membrane lipids present in Archaebacteria are ether-linked, whereas, the eubacteria contain ester-linked membrane lipids.

Detailed explanation-2: -Archaebacteria have different cell membrane structures than other bacteria. The lipids in archaebacteria cell membranes are ether-linked compared to ester-linked in other bacteria. The difference in the cell membrane structure makes them more resistant to harsh environmental conditions.

Detailed explanation-3: -The cell wall of archaea consists of S-layers and lacks peptidoglycan molecules with the exception of methanobacteria who have pseudopeptidoglycan in their cell wall. Eubacteria are enclosed by a cell wall. The wall is made of cross-connected chains of peptidoglycan, a polymer that mixes amino acids and sugar chains.

Detailed explanation-4: -Like bacteria, archaeans have no internal membranes and their DNA exists as a single loop called a plasmid. However, their tRNAs have a number of features that differ from all other living things. The tRNA molecules (short for “transfer RNA") are important in decoding the message of DNA and in building proteins.