Question

Read the following statements and select the incorrect ones.
(i) Methanogens are eubacteria which produce methane in marshy areas.
(ii) Nostoc is a filamentous blue ­green alga which fixes atmospheric nitrogen.
(iii) Cyanobacteria have chlorophyll a similar to green plants
(iv) Mycoplasma has a cell wall.
The incorrect statements are

• A. i and ii
• B. ii and iii
  
• C. i and iv
• D. i, ii and iv

Answer 1

The correct option is C i and iv

The incorrect statements are i and iv.
Methanogens are archaebacteria which are very distinct from eubacteria.
Mycoplasma are the smallest living cells known and they lack a cell wall.
Nostoc is a blue green algae and has specialized cells called heterocysts that help in nitrogen fixation.
Cyanobacteria (blue green algae) have chlorophyll pigments similar to higher plants and they are photoautotrophs.