In Plasmodium , cyst around the ookinete is

Options

A. Partly secreted by the intestinal wall and partly by salivary gland
B. completely secreted by the stomach wall .
C. completely secreted by the ookinete
D. Partly secreted by the stomach wall and partly by the ookinete itself.

Answer

To solve the question regarding the cyst around the ookinete in Plasmodium, we can break down the process step by step:

### Step-by-Step Solution:

1. **Understanding the Life Cycle of Plasmodium**:
- Plasmodium is a genus of parasitic protozoa that causes malaria. Its life cycle involves both asexual and sexual reproduction, occurring in different hosts (humans and mosquitoes).

2. **Identifying the Ookinete Stage**:
- The ookinete is a motile zygote stage that forms after the fertilization of male and female gametes in the stomach of the female Anopheles mosquito. This stage is crucial for the development of the parasite within the mosquito.

3. **Transformation into Oocyst**:
- After fertilization, the ookinete penetrates the wall of the mosquito's stomach and becomes immobile. It then takes on a spherical shape and begins to encyst, forming a protective wall around itself. This structure is referred to as the oocyst.

4. **Formation of the Cyst Wall**:
- The cyst wall of the oocyst is not solely secreted by the ookinete itself. Instead, it is formed from a combination of secretions:
- Partly secreted by the zygote (the ookinete).
- Partly secreted by the stomach wall of the mosquito.

5. **Conclusion**:
- The correct answer to the question about the cyst around the ookinete in Plasmodium is that it is formed from secretions from both the zygote and the stomach wall of the mosquito. Therefore, the correct option is **option number 4**.