In which part of mitochondria the enzyme succinic dehydrogenase is present?

Options

A. Outer membrane
B. Inner membrane
C. Matrix
D. Perimitochondrial space

Answer

**Step-by-Step Solution:**

1. **Understanding Mitochondria Structure**: Mitochondria are double membrane-bound organelles, consisting of an outer membrane and an inner membrane. The outer membrane is permeable to small molecules, while the inner membrane is highly folded into structures called cristae.

2. **Function of Mitochondria**: Mitochondria are known as the powerhouse of the cell because they are responsible for producing energy in the form of ATP through cellular respiration.

3. **Location of Succinic Dehydrogenase**: Succinic dehydrogenase is an important enzyme that plays a role in both the Krebs Cycle (also known as the Citric Acid Cycle) and the Electron Transport Chain (ETC).

4. **Identifying the Enzyme's Location**: The Krebs Cycle occurs in the mitochondrial matrix, while the Electron Transport Chain is located in the inner membrane of the mitochondria. Succinic dehydrogenase specifically is bound to the inner membrane.

5. **Conclusion**: Therefore, the enzyme succinic dehydrogenase is present in the inner membrane of the mitochondria.

**Final Answer**: Succinic dehydrogenase is present in the inner membrane of mitochondria.

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