Oxygen liberated during photosynthesis comes from

Options

A. `CO_(2)`
B. `H_(2)O`
C. Phosphoglyceric
D. Chlorophyll

Answer

**Step-by-Step Solution:**

1. **Understanding Photosynthesis**: Photosynthesis is the process by which plants convert light energy into chemical energy, using carbon dioxide (CO2) and water (H2O) to produce glucose and oxygen.

2. **Identifying the Reactants**: The main reactants involved in photosynthesis are carbon dioxide (CO2) and water (H2O).

3. **Recognizing the By-products**: During the process of photosynthesis, glucose is produced, and oxygen is released as a by-product.

4. **Analyzing the Source of Oxygen**: The question specifically asks where the oxygen that is liberated during photosynthesis comes from.

5. **Examining the Steps of Photosynthesis**:
- **Light Absorption**: The first step involves the absorption of sunlight by chlorophyll, which is essential for the process.
- **Photolysis of Water**: The second step is the splitting of water molecules (H2O) through a process called photolysis. This reaction breaks down water into hydrogen ions (H+), electrons, and molecular oxygen (O2).

6. **Conclusion**: The molecular oxygen (O2) that is released as a by-product during photosynthesis comes specifically from the splitting of water (H2O). Therefore, the correct answer to the question is that the oxygen liberated during photosynthesis comes from water (H2O).

**Final Answer**: Oxygen liberated during photosynthesis comes from water (H2O).

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