Solved Examples – Biological Classifcation

1) Which one of the following organisms is not an example of eukaryotic cells? (CBSE PMT 2011)

a) Paramecium caudatum

b) E. coli

c) Euglena viridis

d) Amoeba proteus

Answer: b

Solution:

E. coli is a prokaryotic celled gram negative bacterium.

2) In eubacteria, a cellular component that resembles eukaryotic cells is (CBSE PMT 2011)

a) Plasma membrane

b) Nucleus

c) Ribosome

d) Cell wall

Answer: a

Solution:

Eubacteria are prokaryotic but eubacteria are enclosed by plasma membrane like eukaryotic cells.

3) Organisms called Methanogens are most abundant in a (CBSE PMT 2011)

a) Sulphur rock

b) Cattle yard

c) Polluted stream

d) Hot spring

Answer: b

Solution:

Methanogens are archaebacteria abundant in cattle yard and paddy fields.