What is obtained as the end product of oxidative phosphorylation?

Options

A. NADH
B. Oxygen
C. ADP
D. `ATP +H_(2)O`

Answer

### Step-by-Step Solution:

1. **Understanding Oxidative Phosphorylation**:
- Oxidative phosphorylation is a metabolic pathway that uses energy released by the oxidation of nutrients to produce ATP. It occurs in the mitochondria of cells.

2. **Role of Electron Transport Chain**:
- During oxidative phosphorylation, electrons are transferred through a series of proteins in the electron transport chain. This process ultimately leads to the reduction of oxygen.

3. **Formation of Water**:
- The final electron acceptor in the electron transport chain is oxygen. When oxygen accepts electrons, it combines with protons (H+) to form water (H2O).

4. **Synthesis of ATP**:
- The energy released during the electron transfer is used to pump protons across the mitochondrial membrane, creating a proton gradient. This gradient drives ATP synthesis from ADP and inorganic phosphate (Pi) through the enzyme ATP synthase.

5. **Identifying the End Products**:
- The end products of oxidative phosphorylation are ATP and water. Thus, the correct answer to the question is option 4: ATP plus H2O.

### Final Answer:
The end product of oxidative phosphorylation is ATP plus H2O.

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