An oxidative phosphorylation is the formation of
(a) `NADPH_(2)` in respiration
(b) `NADPH_(2)` in photosynthesis
(c) ATP in respiration
(d) ATP in photosynthesis

Options

A. `NADPH_(2)` in respiration
B. `NADPH_(2)` in photosynthesis
C. ATP in respiration
D. ATP in photosynthesis

Answer

To answer the question regarding oxidative phosphorylation, we need to understand what this process entails and where it occurs. Let's break it down step by step:

### 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 is a crucial part of cellular respiration.

2. **Location of Oxidative Phosphorylation**:
- This process occurs in the mitochondria of eukaryotic cells. Specifically, it takes place in the inner mitochondrial membrane.

3. **Relation to Cellular Respiration**:
- Oxidative phosphorylation is the final step of cellular respiration. It involves the electron transport chain (ETC), where electrons are transferred through a series of proteins, leading to the production of ATP.

4. **Formation of ATP**:
- During oxidative phosphorylation, the energy from the electrons moving through the ETC is used to pump protons across the mitochondrial membrane, creating a proton gradient. As protons flow back through ATP synthase, ATP is generated from ADP and inorganic phosphate.

5. **Evaluating the Options**:
- (a) NADPH2 in respiration: Incorrect, as NADPH is primarily involved in photosynthesis.
- (b) NADPH2 in photosynthesis: Incorrect, as this is not related to oxidative phosphorylation.
- (c) ATP in respiration: Correct, as oxidative phosphorylation is responsible for ATP production during cellular respiration.
- (d) ATP in photosynthesis: Incorrect, as oxidative phosphorylation is not a part of the photosynthetic process.

6. **Conclusion**:
- The correct answer is (c) ATP in respiration, as oxidative phosphorylation is specifically linked to ATP formation during cellular respiration.

### Final Answer:
(c) ATP in respiration