In photosynthesis , for synthesis of one mole of glucose number of ATP and `NADPH_(2)` required is

Options

A. 10 and 20
B. 18 and 12
C. 8 and 6
D. 12 and 15

Answer

To determine the number of ATP and NADPH required for the synthesis of one mole of glucose during photosynthesis, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Calvin Cycle**: The Calvin cycle is the process through which carbon dioxide is fixed into glucose. Each turn of the Calvin cycle incorporates one carbon atom into an organic molecule.

2. **Determine the Number of Turns Required**: Since glucose (C6H12O6) contains six carbon atoms, the Calvin cycle must turn six times to produce one mole of glucose.

3. **Calculate NADPH Requirement**:
- Each turn of the Calvin cycle requires 2 molecules of NADPH.
- Therefore, for 6 turns, the total NADPH required is:
\[ 6 \text{ turns} \times 2 \text{ NADPH/turn} = 12 \text{ NADPH} \]

4. **Calculate ATP Requirement**:
- Each turn of the Calvin cycle requires 3 molecules of ATP.
- Therefore, for 6 turns, the total ATP required is:
\[ 6 \text{ turns} \times 3 \text{ ATP/turn} = 18 \text{ ATP} \]

5. **Final Result**: Thus, for the synthesis of one mole of glucose, the total requirements are:
- **ATP**: 18
- **NADPH**: 12

### Conclusion:
The number of ATP and NADPH required for the synthesis of one mole of glucose is **18 ATP and 12 NADPH**.

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