Krebs cycle takes place in

Options

A. Matrix of mitochondrion
B. Stroma of chloroplast
C. Thylakoid of Chloroplast
D. Cristae of Mitochondrion

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 series of chemical reactions used by all aerobic organisms to generate energy through the oxidation of acetate derived from carbohydrates, fats, and proteins.

2. **Formation of Acetyl CoA**: Before the Krebs cycle can begin, glucose is broken down through glycolysis into pyruvate. This pyruvate is then converted into acetyl CoA in a process known as the link reaction.

3. **Location of Glycolysis**: Glycolysis occurs in the cytoplasm of the cell. This is where glucose is initially broken down into pyruvate.

4. **Location of the Link Reaction**: The conversion of pyruvate to acetyl CoA takes place in the mitochondrial matrix. This is the area inside the mitochondria where many metabolic processes occur.

5. **Location of the Krebs Cycle**: The Krebs cycle itself occurs in the mitochondrial matrix. This is where acetyl CoA combines with oxaloacetate to form citrate, and the cycle continues to produce CO2, H2O, and ATP.

6. **Conclusion**: Based on the above information, the Krebs cycle takes place in the matrix of the mitochondria.

**Final Answer**: The Krebs cycle takes place in the matrix of mitochondria.

---