when cell converts light energy into chemical energy, which of the following reaction would take place.

Options

A. `ADP+iP=ATP`
B. `ATP-iP=ADP`
C. `AMP+iP=ADP`
D. `GDP+iP=GTP`.

Answer

To answer the question, "When a cell converts light energy into chemical energy, which of the following reactions would take place?", we can analyze the options provided and understand the process of photosynthesis.

### Step-by-Step Solution:

1. **Understanding the Process**: In photosynthesis, plants convert light energy into chemical energy. This process primarily occurs in the chloroplasts of plant cells.

2. **Identifying Key Components**: The main components involved in this energy conversion are:
- Adenosine Diphosphate (ADP)
- Inorganic Phosphate (Pi)
- Adenosine Triphosphate (ATP)

3. **Recognizing the Reaction**: The conversion of ADP to ATP involves the addition of an inorganic phosphate (Pi). This reaction can be summarized as:
\[ \text{ADP} + \text{Pi} \rightarrow \text{ATP} \]

4. **Evaluating the Options**:
- **Option 1**: ADP + inorganic phosphate → ATP (This is correct)
- **Option 2**: ATP - inorganic phosphate → ADP (This is a reverse reaction)
- **Option 3**: AMP + inorganic phosphate → ATP (This is not the primary reaction in photosynthesis)
- **Option 4**: GDP + inorganic phosphate → GDP (This is not relevant to the process of converting light energy to chemical energy)

5. **Conclusion**: The correct reaction that takes place when a cell converts light energy into chemical energy is:
\[ \text{ADP} + \text{inorganic phosphate} \rightarrow \text{ATP} \]

### Final Answer:
The reaction that takes place when a cell converts light energy into chemical energy is:
**ADP + inorganic phosphate → ATP**

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