Folding of inner membrane of mitochondria are called

Options

A. Cistemae
B. Cristae
C. Microtubles
D. Mesosome

Answer

### Step-by-Step Solution:

1. **Understanding the Question**: The question asks about the specific term used for the folding of the inner membrane of mitochondria.

2. **Analyzing the Options**: The options provided are:
- A) Cisternae
- B) Cristae
- C) Microtubules
- D) Mesosomes

3. **Evaluating Each Option**:
- **Cisternae**: This term refers to a series of flattened, curved membrane sacs found in the endoplasmic reticulum and Golgi apparatus. Therefore, this option is incorrect.
- **Cristae**: This term specifically refers to the folds of the inner membrane of mitochondria. These folds increase the surface area for various biochemical reactions, making this option a strong candidate for the correct answer.
- **Microtubules**: These are components of the cytoskeleton made from tubulin proteins and do not relate to the structure of mitochondria. Thus, this option is incorrect.
- **Mesosomes**: These are invaginations of the plasma membrane found in certain bacteria and are not related to mitochondria. Hence, this option is also incorrect.

4. **Identifying the Correct Answer**: Based on the analysis, the correct answer is **B) Cristae**, as it directly refers to the folding of the inner membrane of mitochondria.

5. **Conclusion**: The folding of the inner membrane of mitochondria is called **Cristae**.