Mitochondiral marker enzyme is

Options

A. Pyruvate dehydrogenase
B. Aldolase
C. Amylase
D. Succinic dehydrogenase.

Answer

**Step-by-Step Solution:**

1. **Understanding Marker Enzymes**: Marker enzymes are specific enzymes that help identify and characterize certain cell types or organelles. Each organelle has its own unique marker enzyme.

2. **Identifying the Organelles**: Different organelles have different marker enzymes. For example:
- Plasma membrane: Nucleotidase
- Lysosome: Acid phosphatase (also known as lysozyme)

3. **Focusing on Mitochondria**: The question specifically asks for the mitochondrial marker enzyme. Mitochondria are known as the powerhouse of the cell because they are responsible for ATP production.

4. **Evaluating the Options**: The options provided are:
- Pyruvate dehydrogenase
- Aldolase
- Amylase
- Succinic dehydrogenase

5. **Determining the Correct Marker Enzyme**: Among the options, succinic dehydrogenase is known to be the marker enzyme for mitochondria. This enzyme plays a crucial role in connecting oxidative phosphorylation with the electron transport chain, which is essential for ATP production.

6. **Conclusion**: Therefore, the correct answer to the question "Mitochondrial marker enzyme is" is **succinic dehydrogenase**.

**Final Answer**: Succinic dehydrogenase

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