Directions : In the following question more than one of the answers given may be correct. Select the correct answer and mark it according to the code:
Which of the following are true archaebacteria' (1) Extreme halophiles (2) Extreme thermophyles (3) Methanogens (4) Presence of peptidoglycan cell wallA) 1,2 and 3 are correct.
B) 1 and 2 are correct.
C) 2 and 4 are correct.
D) 1 and 3 are correct.
Correct Answer: A
Solution :
Archaebacteria inhabit extreme environments. They include the methanogens (the methane-generating bacteria of anaerobic muds); the extreme red halophiles; the salt loving bacteria of saturated brine and salted fish and the thermoacidophiles (found in hot sulphur spring or smoldering coal wastes). Their walls do not contain peptidoglycan, but a range of other unique polysaccharides.
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