Mitochondria originated from :–

Options

A. Purple sulphur bacteria
B. Cyanobacteria
C. Mycoplasma
D. Virus

Answer

To answer the question "Mitochondria originated from:", we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Question**: The question is asking about the origin of mitochondria. We need to identify which organism or type of organism is believed to have given rise to mitochondria.

2. **Recall the Endosymbiotic Hypothesis**: This hypothesis suggests that mitochondria originated from free-living bacteria that entered into a symbiotic relationship with ancestral eukaryotic cells.

3. **Identify the Type of Bacteria**: According to the endosymbiotic hypothesis, the specific type of bacteria that is believed to have evolved into mitochondria is the purple sulfur bacteria.

4. **Evaluate the Options**:
- **Option 1**: Purple Sulfur Bacteria - This is the correct answer as per the endosymbiotic hypothesis.
- **Option 2**: Cyanobacteria - This is incorrect because cyanobacteria are known to give rise to chloroplasts, not mitochondria.
- **Option 3**: Mycoplasma - This is also incorrect as mycoplasma are a type of bacteria that do not relate to the origin of mitochondria.
- **Option 4**: Virus - This is incorrect since viruses are not considered living organisms and do not give rise to cellular organelles.

5. **Conclusion**: Based on the endosymbiotic hypothesis and the evaluation of the options, the correct answer is that mitochondria originated from purple sulfur bacteria.

### Final Answer:
Mitochondria originated from **Purple Sulfur Bacteria**.

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