Q. Select the correct combination of the statements (a-d) regarding the characteristics of certain organisms (a) Methanogens are Archaebacteria which produce methane in marshy areas (b) Nostoc is a filamentous blue-green alga which fixes atmospheric nitrogen (c) Chemosynthetic autotrophic bacteria synthesize cellulose from glucose (d) Mycoplasma lack a cell wall and can survive without oxygen The correct statement are
A) (b), (c)
B) (a), (b), (c)
C) (b), (c), (d)
D) (a), (b), (d)
Explanation
[Solution from source] Methanogens are archaebacteria that produce methane in marshes, Nostoc is a filamentous cyanobacterium with heterocysts that fix nitrogen, and Mycoplasma has no cell wall and can survive without oxygen. Chemosynthetic bacteria oxidise inorganic substances such as nitrites or ammonia to get energy for making food; making cellulose from glucose is not what defines them. Answer (4).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.