2002 AIPMT Animal KingdomProtozoa: Ciliates Easy Question 114 of 123 in Animal Kingdom

In which of the animal dimorphic nucleus is found : -

A Amoeba proteus
B Trypanosoma gambiense
C Plasmodium vivax
D Paramecium caudatum

The answer is D.

Solution

Ciliate protozoans such as Paramecium have two different kinds of nuclei (nuclear dimorphism).
The large macronucleus (vegetative nucleus) controls the everyday metabolic activities of the cell.
The small micronucleus (reproductive nucleus) takes part in sexual reproduction (conjugation).
Amoeba, Trypanosoma and Plasmodium have only one kind of nucleus.
So a dimorphic nucleus is found in Paramecium caudatum.

Concept Macronucleus and micronucleus in Paramecium

Animal Kingdom in past papers

123 questions from this chapter have appeared across 27 exam years.