AQA A-Level Biology 2025/6

Biology • A-Level

Question 1 of 40

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Which statement correctly combines the definition of a photoautotroph with the overall photosynthetic equation?

Hint: Remember which substances are the reactants and products in the overall equation for photosynthesis.

An organism that uses light energy to convert CO₂ and H₂O into glucose and O₂ (6CO₂ + 6H₂O → C₆H₁₂O₆ + 6O₂). An organism that uses light energy to convert glucose and O₂ into CO₂ and H₂O (C₆H₁₂O₆ + 6O₂ → 6CO₂ + 6H₂O). An organism that uses chemical energy from inorganic compounds to convert CO₂ and H₂O into glucose and O₂ (6CO₂ + 6H₂O → C₆H₁₂O₆ + 6O₂). An organism that uses light energy to convert CO₂ and O₂ into glucose and H₂O (6CO₂ + 6O₂ → C₆H₁₂O₆ + 6H₂O).

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