Question

Kappa particles make an animal killer when their number in an individual is?
A. 6
B. 60
C. 400
D. 150

Answer 1

Hint: Some species of paramecium contain kappa particles. These kappa particles produce a poisonous toxin that kills animals.

Complete Answer:
- Kappa organism is the organism that contains the K gene in them. Kappa particles are seen in some species of paramecium like paramecium aurelia. These kappa particles are inherited through cytoplasmic inheritance.
- The animals which have kappa particles produce a toxin called paramecium. These strains are called killer strains. This toxin kills the paramecium sensitive animals (animals that do not have kappa particles).
- Kappa particles make an animal killer by producing toxins called paramecium. But the number of kappa particles in an animal is important to make it a killer animal. There should be a minimum of 400 kappa particles to produce paramecium toxins to make an animal killer.

So, the correct answer is 400.

Note: Not all the paramecium aurelia are killer animals. Kappa gene is a dominant gene and is denoted as K. So, the homozygous dominant (KK) and the heterozygous (Kk) will have kappa particles. But, the homozygous recessive (kk) will not have a kappa particle. These animals won’t be killer animals.