Which process deals with the conversion of light energy into chemical energy ?

Options

A. Respiration
B. Photosynthesis
C. Both (A) & (B)
D. None of the above.

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks for the process that converts light energy into chemical energy.

2. **Identifying the Processes**: We have four options to consider:
- Option 1: Respiration
- Option 2: Photosynthesis
- Option 3: Both A and B
- Option 4: None of the above

3. **Analyzing Photosynthesis**:
- Photosynthesis is the process by which green plants, algae, and some bacteria convert light energy (usually from the sun) into chemical energy stored in glucose.
- The general equation for photosynthesis is:
\[ \text{Light Energy} + \text{Carbon Dioxide} + \text{Water} \xrightarrow{\text{Chlorophyll}} \text{Glucose} + \text{Oxygen} \]
- Here, chlorophyll (the green pigment in plants) captures the light energy, which is then used to convert carbon dioxide and water into glucose and oxygen.

4. **Analyzing Respiration**:
- Respiration is the process by which glucose is broken down to release energy in the form of ATP (adenosine triphosphate).
- This process is essentially the reverse of photosynthesis, where glucose is used to produce energy, not to store it.

5. **Conclusion**: Since photosynthesis is the process that specifically converts light energy into chemical energy, the correct answer is:
- **Option 2: Photosynthesis**

**Final Answer**: The process that deals with the conversion of light energy into chemical energy is **photosynthesis**.

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