Kappa particles are present in the cytoplasm of

Options

A. sensitive Paramecia
B. killer Paramecia
C. both sensitive and killer Paramecia
D. none of the above.

Answer

### Step-by-Step Solution:

1. **Understanding Kappa Particles**: Kappa particles are symbiotic bacteria found in the cytoplasm of certain strains of Paramecium. They are known to be gram-negative bacteria.

2. **Identifying the Role of Kappa Particles**: These kappa particles release a toxin called paramecin when they are released into the environment. This toxin is lethal to other strains of Paramecium that do not have these kappa particles.

3. **Differentiating Between Types of Paramecia**: There are two types of Paramecia mentioned:
- **Sensitive Paramecia**: These are strains that do not produce the killer toxin and are susceptible to the effects of paramecin.
- **Killer Paramecia**: These strains contain kappa particles and can produce the killer toxin, which allows them to kill sensitive Paramecia.

4. **Conclusion**: Since kappa particles are specifically associated with killer Paramecia, the correct answer to the question is that kappa particles are present in the cytoplasm of **killer Paramecia**.

### Final Answer:
Kappa particles are present in the cytoplasm of **killer Paramecia**.

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