Mitochondria come in a variety of shapes and sizes and are accurately described by all of the following statements EXCEPT

Options

A. It is an organelle with a double membrane
B. Mitochondria do not rely on the nuclear mRNA for protein synthesis
C. Mitochondria possess infoldings known as cristae
D. Usually mitochondria are shaped like rods

Answer

To solve the question regarding the statements about mitochondria, we need to analyze each statement and identify which one is incorrect.

### Step-by-Step Solution:

1. **Understand the Structure of Mitochondria**:
- Mitochondria are organelles known for their role in energy production. They have a double membrane structure, consisting of an outer membrane and a highly folded inner membrane.

2. **Evaluate Each Statement**:
- **Statement 1**: "Mitochondria is an organelle with double membrane."
- This statement is **correct**. Mitochondria indeed have a double membrane.

- **Statement 2**: "Mitochondria do not rely on the nuclear mRNA for protein synthesis."
- This statement is **incorrect**. Mitochondria do rely on nuclear mRNA for some of their protein synthesis, as they have their own DNA but still depend on the nuclear genome for many proteins.

- **Statement 3**: "Mitochondria possess infolding known as cristae."
- This statement is **correct**. The inner membrane of mitochondria has infoldings called cristae, which increase the surface area for biochemical reactions.

- **Statement 4**: "Usually mitochondria have the shape of rods."
- This statement is **correct**. Mitochondria are typically rod-shaped or cylindrical.

3. **Identify the Incorrect Statement**:
- The only statement that is incorrect is **Statement 2**, which claims that mitochondria do not rely on nuclear mRNA for protein synthesis.

4. **Conclusion**:
- Therefore, the answer to the question is **Statement 2**.

### Final Answer:
The incorrect statement about mitochondria is: "Mitochondria do not rely on the nuclear mRNA for protein synthesis."

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