A cyst of Entamoeba histolytica produces trophozoites

Options

A. 1
B. 2
C. 4
D. 8

Answer

To solve the question regarding how many trophozoites are produced from a cyst of Entamoeba histolytica, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Organism**: Recognize that the organism in question is Entamoeba histolytica, which is known to exist in two forms: cysts and trophozoites.

2. **Understand the Cyst Stage**: The cyst of Entamoeba histolytica is the infective stage for humans. It is typically quadrenucleate, meaning it contains four nuclei.

3. **Infection Process**: When a person ingests the quadrenucleate cyst through contaminated food or water, the cyst enters the digestive system.

4. **Cyst Wall Digestion**: Once ingested, the cyst wall survives the acidic environment of the stomach (gastric juice) and reaches the small intestine.

5. **Activation of Trophozoites**: In the small intestine, the enzyme trypsin digests the cyst wall, leading to the release of the trophozoites.

6. **Number of Trophozoites Produced**: Each quadrenucleate cyst produces four trophozoites upon digestion.

7. **Conclusion**: Therefore, the answer to the question is that a cyst of Entamoeba histolytica produces **4 trophozoites**.

### Final Answer:
The cyst of Entamoeba histolytica produces 4 trophozoites.

---