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Standard XII
Biology
Question

Archaebacteria differ from eubacteria in which one of the following respect?
  1. Their cell wall lack peptidoglycan compound
  2. They inhabit extreme environment
  3. They have unique 16s RNA
  4. All of the above

A
They have unique 16s RNA
B
All of the above
C
Their cell wall lack peptidoglycan compound
D
They inhabit extreme environment
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Solution
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  • Archaebacteria are primitive bacteria.
  • The cell wall is composed of glycolipids, amino acids and glycoproteins which form the S-layer.
  • There is no peptidoglycan present in the bacterial cell wall.
  • These organisms can survive in high salt concentration, high temperature, high pressure, etc.
  • They have genetically different 16S rRNA.
Thus, the correct answer is option D.

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