1. Tardigrade
  2. Question
  3. Biology
  4. Select the correct combination of the statements(a-d) regarding the characteristics of certain organisms: (i) Methanogens are archaebacteria which produce methane in marshy area (ii) Nostoc is a filamentous blue green alga which fixes atmospheric nitrogen (iii) Chemosynthetic autotrophic bacteria synthesize cellulose from glucose (iv) Mycoplasma lack a cell wall and can survive without oxygen. The correct statements are :

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Q. Select the correct combination of the statements(a-d) regarding the characteristics of certain organisms :
(i) Methanogens are archaebacteria which produce methane in marshy area
(ii) Nostoc is a filamentous blue green alga which fixes atmospheric nitrogen
(iii) Chemosynthetic autotrophic bacteria synthesize cellulose from glucose
(iv) Mycoplasma lack a cell wall and can survive without oxygen.
The correct statements are :

AIPMTAIPMT 2010Biological Classification

Solution:

Chemosynthetic autotrophic bacteria oxidise various inorganic substances such as nitrates, nitrites and ammonia and use the released energy for their ATP production. They play a great role in recycling nutrients like nitrogen, phosphorous, iron and sulphur.