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Which of the following represents the balanced equation for the Calvin cycle in photosynthesis, showing the conversion of carbon dioxide into glucose?

1. 6CO2 + 12NADPH + 18ATP → C6H12O6 + 12NADP + 18ADP
2. 6CO2 + 6NADPH + 12ATP → C6H12O6 + 6NADP + 12ADP
3. 6CO2 + 12NADPH + 18ATP → 2C6H12O6 + 12NADP + 18ADP
4. 6CO2 + 12NADPH + 18ATP → C6H12O6 + 6NADP + 9ADP

Correct answer: 6CO2 + 12NADPH + 18ATP → C6H12O6 + 12NADP + 18ADP

Solution

The Calvin cycle in photosynthesis involves the conversion of carbon dioxide into glucose, requiring 6CO2, 12NADPH, and 18ATP molecules to produce one glucose molecule, C6H12O6, along with 12NADP and 18ADP as byproducts.

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