Which of the following is not archaebacteria?

  1. Halophile
  2. Thermoalkalophiles
  3. Methanogens
  4. Thermoacidophiles
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Hot spring hosts which kind of archaebacteria?

  1. Thermoacidophiles
  2. Thermoalkalophiles
  3. Thermophiles
  4. Thermoneutrophiles
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Which organisms are responsible for the production of  biogas?

  1. Archaebacteria
  2. Eubactetia
  3. Mycoplasma
  4. Protists
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The characteristic feature of eubacteria is -

  1. Rigid cell wall
  2. Flagellum in motile ones
  3. Chlorophyll a
  4. all of these
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Cyanobacteria do not possess which feature?

  1. Unicellular
  2. Colonial or filamentous
  3. Form blooms in polluted water bodies
  4. Only marine algae
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The specialised cells to fix atmospheric nitrogen is called as

  1. Heterocyst
  2. Heterocyte
  3. Heterocoem
  4. Heterolog
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Find the incorrect match.

  1. Heterocyst-Archaebacteria
  2. Gelatinous sheath- BGA
  3. Methanogen- Biogas
  4. Chlorella- protista
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Which of the following is correct with respect to heterocyst

  1. Nostoc, Anabena
  2. Only Anabena
  3. Nostoc
  4. All eubactetia
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Chemosynthetic autotrophic bacteria does not help in recycling of

  1. Nitrogen
  2. Iron
  3. Sulphur
  4. Mangnese 
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Chemosynthetic bacteria does not use which inorganic substrate?

  1. Nitrites
  2. Nitrates
  3. Chlorides
  4. Both a and b
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