Question

Which of the following unicellular organism has a macronucleus for trophic function and one or more micronuclei for reproduction?

• A. Euglena
• B. Amoeba
• C. Paramecium
• D. Trypanosoma

Answer 1

Answer: (C)

Paramecium

Paramecia have two kinds of nuclei, a large ellipsoidal nucleus called as macronucleus and at least one small nucleus called as micronucleus.

The macronucleus is the centre of all metabolic activities of the organism. The micronucleus is a storage site for the genetic material of the organism. It gives rise to the macronucleus and is responsible for the genetic reorganization that occurs during conjugation.

Therefore, the correct answer is option C.