Mitoplast is :-

Options

A. Outer membrane less chloroplast
B. Outer membrane less mitochondria
C. Granum less chloroplast
D. Well developed nucleus

Answer

**Step-by-Step Solution:**

1. **Understanding Mitochondria**:
- Mitochondria are double membrane-bound organelles found in eukaryotic cells. They are often referred to as the "powerhouses of the cell" because they generate ATP, the energy currency of the cell.

2. **Structure of Mitochondria**:
- Mitochondria consist of two membranes: an outer membrane and an inner membrane.
- The outer membrane is permeable to small molecules and ions, while the inner membrane is selectively permeable and contains proteins involved in the electron transport chain and ATP synthesis.

3. **Definition of Mitoplast**:
- A mitoplast is a modified form of mitochondria where the outer membrane is absent or significantly reduced.
- It retains the inner membrane and the matrix, which contains enzymes for the Krebs cycle and other metabolic processes.

4. **Identifying the Correct Option**:
- The question asks for the definition of mitoplast.
- Among the options provided:
- Option 1: Outer membrane less chloroplast - Incorrect, as this refers to chloroplasts, not mitochondria.
- Option 2: Outer membrane less mitochondria - Correct, as this accurately describes a mitoplast.
- Option 3: Cranium less chloroplasts - Incorrect, unrelated to the question.
- Option 4: Well-developed nucleus - Incorrect, as this does not pertain to the definition of mitoplast.

5. **Conclusion**:
- The correct answer is option 2: "Outer membrane less mitochondria".