During aerobic respiration, the passing on of the electrons removed as a part of the hydrogen atom to molecular `O_2` occurs in the……..

Options

A. Cytoplasm
B. Mitochondrial outer membrane
C. Mitochondrial inner membrane
D. Mitochondrial matrix

Answer

To solve the question regarding where the passing on of electrons removed as a part of the hydrogen atom to molecular oxygen occurs during aerobic respiration, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Aerobic Respiration**:
- Aerobic respiration is a metabolic process that requires oxygen to produce energy. It involves several stages, including glycolysis, the Krebs cycle, and oxidative phosphorylation.

2. **Identifying the Electron Transport Chain**:
- The process of transferring electrons to molecular oxygen is part of the electron transport chain (ETC), which is crucial for aerobic respiration.

3. **Locating the Electron Transport Chain**:
- The electron transport chain occurs in the mitochondria, which are the powerhouse of the cell. Mitochondria have a double membrane structure.

4. **Determining the Specific Location**:
- The electron transport chain is specifically located in the inner mitochondrial membrane. This is where the electron carriers are embedded, and the transfer of electrons to oxygen occurs.

5. **Conclusion**:
- Therefore, during aerobic respiration, the passing on of the electrons removed as a part of the hydrogen atom to molecular oxygen occurs in the **mitochondrial inner membrane**.

### Final Answer:
The passing on of the electrons removed as a part of the hydrogen atom to molecular O2 occurs in the **mitochondrial inner membrane**.