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) Meihanogens (4) Presence of pephdogtycan cell wallA) 1, 2 and 3 are correct
B) 1 and 2 are correct
C) 1, 2 and 4 are correct
D) 1 and 3 are correct
Correct Answer: A
Solution :
Archaebacteria have following features: They 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 smouldering coal wastes). Their walls do not contain peptidoglycan, but a range of other unique polysaccharides. Their cell membrane is of a single layer of, glycero-hydro-carbon-glycerol chains. Their ribosomes are insensitive to chloramphenicol.
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