Which is the site of Krebs cycle ?

Options

A. Chloroplast
B. Golgi body
C. Mitochondria
D. Endoplasmic reticulum

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 part of cellular respiration. It is responsible for generating energy through the oxidation of acetyl-CoA derived from carbohydrates, fats, and proteins.

2. **Identifying the Location**: The Krebs cycle occurs in specific organelles within the cell. To determine the correct site, we need to evaluate the options provided: chloroplast, Golgi bodies, mitochondria, and endoplasmic reticulum.

3. **Evaluating Each Option**:
- **Chloroplast**: This organelle is primarily involved in photosynthesis, not in the Krebs cycle.
- **Golgi Bodies**: These are involved in modifying, sorting, and packaging proteins and lipids, not in energy production.
- **Mitochondria**: Known as the powerhouse of the cell, mitochondria are responsible for aerobic respiration, including the Krebs cycle.
- **Endoplasmic Reticulum**: This organelle is involved in protein and lipid synthesis, not in the Krebs cycle.

4. **Conclusion**: Based on the evaluation, the correct answer is **mitochondria**, as this is where the Krebs cycle takes place, specifically in the mitochondrial matrix.

**Final Answer**: The site of the Krebs cycle is the **mitochondria**.

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