If in a photosynthetic system `H_2O^(18)` type is provided , what will be the type of oxygen released in the process ?

Options

A. `O^(18)`
B. `O^(16)`
C. normal `O_2`
D. `O^(14)`

Answer

To solve the question of what type of oxygen is released in a photosynthetic system when `H_2O^(18)` is provided, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Photosynthesis**:
- Photosynthesis is the process by which green plants, algae, and some bacteria convert light energy into chemical energy, using carbon dioxide and water. The general equation for photosynthesis is:
\[ 6CO_2 + 6H_2O \xrightarrow{\text{light}} C_6H_{12}O_6 + 6O_2 \]
- Here, water (H₂O) is split to release oxygen (O₂).

2. **Identifying the Source of Oxygen**:
- The oxygen released during photosynthesis comes from the water molecules used in the process. This is a result of the photolysis of water, which occurs in the thylakoid membranes of chloroplasts.

3. **Photolysis of Water**:
- The photolysis of water can be represented as:
\[ 2H_2O \xrightarrow{\text{light}} 4H^+ + 4e^- + O_2 \]
- This reaction shows that for every two molecules of water, one molecule of oxygen is produced.

4. **Considering the Isotope**:
- In this scenario, the water provided is `H_2O^(18)`, which means it contains the heavier isotope of oxygen (O-18).
- Since the oxygen released during photosynthesis is derived directly from the water molecules, the oxygen released will also have the same isotope as that in the water.

5. **Conclusion**:
- Therefore, if `H_2O^(18)` is provided, the type of oxygen released in the process will also be `O_2^(18)`.

### Final Answer:
The type of oxygen released in the process will be `O_2^(18)`.