Entamoeba histolytica secretes protelytic enzyme called

Options

A. Polypeptidase
B. Histolysin
C. Persin
D. Trypsin.

Answer

### Step-by-Step Solution:

1. **Identify the Organism**: The question refers to *Entamoeba histolytica*, which is a type of amoeboid protozoa.

2. **Location in the Host**: *Entamoeba histolytica* primarily resides in the large intestine of humans, where it can cause various infections.

3. **Life Cycle Characteristics**: This organism is monogenetic, meaning it requires only one host to complete its life cycle.

4. **Form of the Organism**: The active form of *Entamoeba histolytica* is known as the trophozoite, which is the parasitic form that infects the host.

5. **Infection Mechanism**: The trophozoites infect the mucosa and submucosa layers of the intestine, leading to tissue damage.

6. **Cyst Formation**: Following binary fission, trophozoites can form numerous cysts, which are responsible for spreading the infection.

7. **Disease Caused**: The infection caused by *Entamoeba histolytica* is known as amoebiasis, which can lead to symptoms such as diarrhea, abdominal pain, and cramps.

8. **Proteolytic Enzymes**: *Entamoeba histolytica* secretes proteolytic enzymes that help it digest the epithelial cells of the intestine.

9. **Specific Enzyme Identification**: Among the enzymes secreted, the main proteolytic enzyme is histolysin. Other mentioned enzymes like polypeptidase, persin, and trypsin are not secreted by this organism.

10. **Conclusion**: Therefore, the correct answer to the question is that *Entamoeba histolytica* secretes the proteolytic enzyme called histolysin.