Cell organelle exclusively found in all autotrophic plant cells and in Euglenoides is

Options

A. Mitochondria
B. Chloroplast
C. lysosomes
D. Ribosomes

Answer

**Step-by-Step Solution:**

1. **Understanding the Question:**
The question asks for a cell organelle that is exclusively found in all autotrophic plant cells and in Euglenoides.

2. **Identifying Autotrophic Organisms:**
Autotrophic organisms, such as plants and Euglenoides, are capable of photosynthesis, which means they can produce their own food using sunlight.

3. **Examining the Options:**
The options provided are:
- A) Mitochondria
- B) Chloroplast
- C) Lysosome
- D) Ribosomes

4. **Analyzing Each Option:**
- **Mitochondria:** Known as the powerhouse of the cell, mitochondria are involved in ATP production and are found in all eukaryotic cells (both plant and animal). Thus, they are not exclusive to autotrophic plant cells or Euglenoides.
- **Chloroplast:** This organelle is responsible for photosynthesis and contains chlorophyll, which is necessary for the process. Chloroplasts are found exclusively in autotrophic plant cells and some protists like Euglenoides.
- **Lysosome:** These organelles contain digestive enzymes and are primarily found in animal cells. They are not exclusive to plant cells.
- **Ribosomes:** These are involved in protein synthesis and are present in all types of cells, including both plant and animal cells.

5. **Conclusion:**
Based on the analysis, the only organelle that is exclusively found in all autotrophic plant cells and in Euglenoides is **Chloroplast**.

**Final Answer:**
B) Chloroplast

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