In overall process of photosynthesis, the number of `CO_(2)` water, sugar and `O_(2)` molecules utilised and produced is

Options

A. 12
B. 13
C. 19
D. 31

Answer

To solve the question regarding the number of CO₂, water, sugar, and O₂ molecules utilized and produced in the overall process of photosynthesis, 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 (CO₂) and water (H₂O) to produce glucose (C₆H₁₂O₆) and oxygen (O₂).

2. **Writing the Overall Equation**:
The overall balanced equation for photosynthesis can be written as:
\[ 6 \, \text{CO}_2 + 6 \, \text{H}_2\text{O} + \text{light energy} \rightarrow \text{C}_6\text{H}_{12}\text{O}_6 + 6 \, \text{O}_2 \]

3. **Identifying the Molecules Utilized**:
From the equation, we see that:
- 6 molecules of carbon dioxide (CO₂) are utilized.
- 6 molecules of water (H₂O) are utilized.

4. **Identifying the Molecules Produced**:
From the equation, we see that:
- 1 molecule of glucose (C₆H₁₂O₆) is produced.
- 6 molecules of oxygen (O₂) are produced.

5. **Calculating Total Molecules**:
Now, we can calculate the total number of molecules utilized and produced:
- Total molecules utilized = 6 (CO₂) + 6 (H₂O) = 12 molecules
- Total molecules produced = 1 (C₆H₁₂O₆) + 6 (O₂) = 7 molecules

6. **Final Calculation**:
Adding both utilized and produced molecules together:
\[ \text{Total molecules} = 12 \, (\text{utilized}) + 7 \, (\text{produced}) = 19 \, \text{molecules} \]

### Conclusion:
Therefore, the total number of molecules utilized and produced in the process of photosynthesis is **19**.