The process of ATP synthesis from ADP in the presence of light in chlororplasts is called

Options

A. Photoelectron transport
B. Photophosphorylation
C. Photo system-II
D. Photorespiration

Answer

To answer the question, "The process of ATP synthesis from ADP in the presence of light in chloroplasts is called," we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Question**: The question is asking about a specific process that occurs in chloroplasts, which involves the synthesis of ATP from ADP when light is present.

2. **Identifying Key Terms**:
- ATP (Adenosine Triphosphate) is the energy currency of the cell.
- ADP (Adenosine Diphosphate) is a precursor to ATP.
- Chloroplasts are the organelles in plant cells where photosynthesis occurs.
- Light is essential for the process being described.

3. **Considering the Options**: The options provided are:
- Photoelectric transport
- Photophosphorylation
- Photosystem II
- Photorespiration

4. **Evaluating Each Option**:
- **Photoelectric transport**: This term does not relate to ATP synthesis and is incorrect.
- **Photophosphorylation**: This is the correct term. It refers to the process of adding a phosphate group to ADP to form ATP using energy derived from light.
- **Photosystem II**: This is involved in the light reactions of photosynthesis but does not directly refer to ATP synthesis.
- **Photorespiration**: This is a different process that involves the fixation of oxygen and is not related to ATP synthesis.

5. **Conclusion**: Based on the evaluation, the correct answer is **Photophosphorylation**. This process occurs in the thylakoid membranes of chloroplasts during the light-dependent reactions of photosynthesis.

### Final Answer:
The process of ATP synthesis from ADP in the presence of light in chloroplasts is called **Photophosphorylation**.

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