Biological Classification MCQ Question with Answer

Biological Classification MCQ with detailed explanation for interview, entrance and competitive exams. Explanation are given for understanding.

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Question No : 1
Bacteria are found to be primitive organisms because they

are small, microscopic which are not seen with naked eye.
cause serious diseases to human being, domesticated animals and crop plants.
produce endospores which are very resistant to adverse conditions.
possess incipient nucleus and show amitotic division.

Question No : 2
Which one single organism or the pair of organisms is correctly assigned to its taxonomic group?

Paramecium and Plasmodium belong to the same kingdom as that of Penicillium.
Lichen is a composite organism formed from the symbiotic association of an alga and a protozoan.
Yeast used in making bread and beer is a fungus.
Nostoc and Anabaena are examples of protista.

Question No : 3
Bacteria were regarded to be plants because

some of them are green in colour.
they are present every where.
some of them cannot move.
they have a rigid cell wall.

Question No : 4
A fungus contains cells with two nuclei from different genomes. The nuclei do not fuse but divide independently and simultaneously as new cells are formed. This fungus belongs to


Question No : 5
Ustilago causes plant diseases (called smuts) because

they parasitize on cereals.
they lack mycelium.
they develop sooty masses of spores.
their affected parts becomes completely black.

Question No : 6
In some viruses, RNA is present instead of DNA indicating that

their nucleic acid must combine with host DNA before replication.
they cannot replicate.
there is no hereditary information.
RNA can transfer heredity material.

Question No : 7
When a moist bread is kept exposed in air, it becomes mouldy and black because

spores are present in the water.
spores are present in the bread.
spores are present in the air.
the bread decomposes.