The passing on of the electrons removed as part of the hydrogen atoms to molecular oxygen with synthesis of ATP, the site of this process located .

Options

A. in the matrix of the mitochondria
B. in the cytoplasm
C. in the intermembrane space of mitochondria
D. on the Inner membrane of the mitochondria

Answer

To solve the question regarding the passing on of electrons removed from hydrogen atoms to molecular oxygen with the synthesis of ATP, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Process**: The question describes a process where electrons are transferred from hydrogen atoms to molecular oxygen, which is a key part of cellular respiration. This process is essential for ATP synthesis.

2. **Identifying the Location**: The question asks for the specific site where this electron transfer occurs. In cellular respiration, this electron transfer is part of the electron transport chain (ETC).

3. **Reviewing the Options**:
- **Option 1: Matrix of the mitochondria**: This is where the Krebs cycle occurs, not the electron transport chain.
- **Option 2: Cytoplasm**: Glycolysis occurs here, but not the electron transport chain.
- **Option 3: Intermembrane space of the mitochondria**: This space is involved in the proton gradient but is not the site of electron transfer.
- **Option 4: Inner membrane of mitochondria**: This is where the electron transport chain is located, and it is responsible for passing electrons to oxygen and synthesizing ATP.

4. **Conclusion**: Based on the analysis of the options, the correct answer is that the site of this process is located on the **inner membrane of mitochondria**.

### Final Answer:
The correct answer is **Option 4: Inner membrane of mitochondria**.

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