Question

From the following statements, identify the ones, which are not relevant to archaebacteria.
(a) They live in some of the harshest habitats.
(b) They are present in the gut of several ruminant animals.
(c) They are characterized by the presence of a rigid cell wall.
(d) They include mycoplasma.
(e) They are also referred to as blue-green algae.

• A. (a), (b) and (c)
• B. (a), (c) and (e)
• C. (c), (d) and (e)
• D. (a), (c) and (d)
• E. (b), (c) and (e)

Answer 1

The correct option is C (c), (d) and (e)

Archaebacteria are a type of single-cell organism which do not have membrane-bound organelles. They also lack true nucleus. They live in some of the harshest habitats. They have cell wall which is made up of polysaccharides and proteins without peptidoglycan. They include Methanogens, halophiles, thermophiles. Methanogens produce methane gas or biogas. They are present in the gut of several ruminant animals. Halophiles are present in areas with high salt concentrations. Thermophiles are present in areas with extremely high temperature.

Thus, the correct answer is '(c), (d) and (e).'