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Solution


Q.

Archaebacteria differ from eubacteria in           [2014]
1 cell membrane structure  
2 mode of nutrition  
3 cell shape  
4 mode of reproduction  

Ans.

(1)

The archaebacteria are the 'ancient' bacteria that include extremophiles like methanogens, halophiles, and thermophiles. They represent some of the most ancient of life forms that persist today. They have both eubacterial and eukaryotic characters besides the features unique to them. Their mode of reproduction, nutrition, and cell shape and size resembles a typical eubacteria. Their cell walls are made of a variety of polymers but do not contain peptidoglycan, unlike eubacteria. Lipids of their cytoplasmic membranes are ether-linked, unlike eubacteria, which contain glycerol ester lipids in their cell membrane.