Question

Select the correct combination of 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 lacks a cell wall and can survive without oxygen.
The correct statements are

• A. b, c
• B. a, b, c
• C. b, c, d
• D. a, b, d

Answer 1

The correct option is D a, b, d

Methonogens belongs to Archaebacteria group. They produce methane gas in marshy areas. They produce biogas. Nostoc are filamentous Blue-green algae. They are capable of converting atmospheric nitrogen into ammonium compounds and make it available to plants. Chemosynthetic autotrophic bacteria use inorganic molecules as a source of energy and convert them into organic substances. Mycoplasma are the smallest bacteria. They do not have cell wall around nuclear membrane. They can survive in anaerobic condition.

Thus, the correct answer is 'a, b, d.'