Semi-autonomous organelle is

Options

A. E.R.
B. Lysosome
C. Peroxisome
D. Chloroplast

Answer

**Step-by-Step Solution:**

1. **Understanding the Term "Semi-Autonomous Organelle":**
- Semi-autonomous organelles are those organelles that have some degree of independence in their functions and possess their own DNA. They are believed to have originated from ancestral prokaryotic cells (bacteria).

2. **Identifying Characteristics of Semi-Autonomous Organelles:**
- These organelles can replicate independently of the cell cycle.
- They contain their own ribosomes and can synthesize some of their own proteins.
- They are involved in energy production or photosynthesis.

3. **Examples of Semi-Autonomous Organelles:**
- The two main examples of semi-autonomous organelles are **mitochondria** and **chloroplasts**.
- Mitochondria are known as the "powerhouse of the cell" because they generate ATP, the energy currency of the cell.
- Chloroplasts are involved in photosynthesis, converting light energy into chemical energy stored in glucose.

4. **Analyzing the Given Options:**
- The options provided are:
1. Endoplasmic Reticulum (ER)
2. Lysosome
3. Peroxisome
4. Chloroplast
- We need to determine which of these is a semi-autonomous organelle.

5. **Evaluating Each Option:**
- **Endoplasmic Reticulum (ER)**: Not a semi-autonomous organelle; it does not have its own DNA.
- **Lysosome**: Not a semi-autonomous organelle; it does not have its own DNA.
- **Peroxisome**: Not a semi-autonomous organelle; it does not have its own DNA.
- **Chloroplast**: This is a semi-autonomous organelle because it has its own DNA and is involved in photosynthesis.

6. **Conclusion:**
- The correct answer is **Chloroplast**.