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Difficulty: EasyPlant Biology and Photosynthesis

During the process of photosynthesis, green plants use sunlight to convert water and carbon dioxide into chemical energy. Which gas is released into the atmosphere as a direct byproduct of this reaction?

  1. A
    Carbon dioxide
  2. OxygenAnswer
  3. C
    Nitrogen
  4. D
    Methane

Answer

Oxygen
Oxygen is generated during the light-dependent stage of photosynthesis when water molecules (H2OH_2O) are split. While plants synthesize glucose for metabolic fuel, the resulting oxygen gas (O2O_2) is released through the stomata into the atmosphere.

Step-by-Step Solution

1
Identify the primary chemical equation for photosynthesis.
6CO₂ + 6H₂O + light energy → C₆H₁₂O₆ + 6O₂
Understanding the inputs and outputs establishes which substances are consumed and which are generated.
2
Differentiate between the primary organic product and the released gas byproduct.
Glucose (C₆H₁₂O₆) is stored for energy, while oxygen gas (O₂) is released into the surrounding air.
The question specifically asks for the gas released into the atmosphere.

Key Concept

Photosynthetic Reactants and Byproducts
Estimated Time:45s
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Topics

Plant Biology and Photosynthesis

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