The enzymes of krebs cycle are present

Options

A. on outer membrane
B. on inner membrane
C. in outer chamber
D. in inner chamber

Answer

**Step-by-Step Solution:**

1. **Understanding the Krebs Cycle**: The Krebs cycle, also known as the citric acid cycle or TCA cycle, is a crucial metabolic pathway that takes place in the mitochondria of cells. It plays a significant role in cellular respiration by producing energy.

2. **Location of the Krebs Cycle**: The Krebs cycle occurs within the mitochondria, which are the powerhouses of the cell. The mitochondria have two membranes: an outer membrane and an inner membrane.

3. **Enzyme Distribution**: The enzymes that facilitate the reactions of the Krebs cycle are primarily located in the mitochondrial matrix, which is the innermost compartment of the mitochondria.

4. **Exception - Succinate Dehydrogenase**: There is one exception to this general rule. The enzyme succinate dehydrogenase, which converts succinic acid into fumaric acid, is located in the inner membrane of the mitochondria rather than the matrix.

5. **Conclusion**: Therefore, the majority of the enzymes of the Krebs cycle are found in the mitochondrial matrix (inner chamber), with the exception of succinate dehydrogenase, which is found in the inner membrane.

**Final Answer**: The enzymes of the Krebs cycle are primarily present in the mitochondrial matrix (inner chamber).

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