Question

When Paramoecium was subjected to X-ray its macronucleus and one of the following stopped?

• A. Locomotion, digestion, osmoregulation
• B. Reproduction, digestion, locomotion
• C. Reproduction, locomotion, osmoregulation
• D. Reproduction, osmoregulation

Answer 1

The correct option is A Locomotion, digestion, osmoregulation

Nuclear dimorphism is a phenomenon in which there are two types of the nucleus in the cell like in Paramoecium. The smaller nucleus is known as the micronucleus involved in the reproductive processes. The larger nucleus is known as the macronucleus involved in the regulation and control of metabolism. When the macronucleus is subjected to X-ray, it gets damaged and the functions of metabolism are stopped which affects locomotion, digestion, osmoregulation, etc.

Thus, the correct answer is option A.