Aerobic respiration is composed of two crucial events. Choose the correct option regarding the site of these events.

Options

A. Both of the events take place in the matrix of the mitochondria.
B. Both of the events take place in the inner membrane of the mitochondria.
C. One event takes place in the matrix of the mitrocondria and the other in the cytoplasm of cell.
D. Neither of the events take place in the mitochondria

Answer

To solve the question regarding the sites of the two crucial events in aerobic respiration, we can break it down step by step:

### Step-by-Step Solution:

1. **Understand Aerobic Respiration**:
- Aerobic respiration is the process of producing cellular energy in the presence of oxygen. It involves breaking down glucose to produce carbon dioxide, water, and ATP (adenosine triphosphate).

2. **Identify the Two Crucial Events**:
- The two major events in aerobic respiration are:
- Glycolysis
- Krebs Cycle (also known as the Citric Acid Cycle)

3. **Determine the Site of Glycolysis**:
- Glycolysis occurs in the cytoplasm of the cell. This is where glucose is converted into pyruvate, releasing a small amount of ATP.

4. **Determine the Site of the Krebs Cycle**:
- The Krebs Cycle occurs in the mitochondria, specifically in the mitochondrial matrix. This is where pyruvate is further broken down to produce carbon dioxide, ATP, and electron carriers (NADH and FADH2).

5. **Evaluate the Options**:
- Now, we need to analyze the options given in the question:
- **Option A**: Both events take place in the matrix of mitochondria. (Incorrect)
- **Option B**: Both events take place in the inner membrane of mitochondria. (Incorrect)
- **Option C**: One event takes place in the matrix of mitochondria and the other in the cytoplasm of the cell. (Correct)
- **Option D**: Neither of the events takes place in the mitochondria. (Incorrect)

6. **Select the Correct Answer**:
- Based on the analysis, the correct option is **Option C**: One event takes place in the matrix of mitochondria (Krebs Cycle) and the other in the cytoplasm (Glycolysis).

### Final Answer:
The correct option regarding the site of the events in aerobic respiration is **Option C**: One event takes place in the matrix of mitochondria and the other in the cytoplasm of the cell.