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Multiple Choice
In the process of photosynthesis, from which molecule is the oxygen gas released?
A
Carbon dioxide (CO2)
B
Chlorophyll
C
Glucose (C6H12O6)
D
Water (H2O)
Verified step by step guidance
1
Understand that photosynthesis is a process used by plants to convert light energy into chemical energy, producing oxygen as a byproduct.
Recall the overall chemical equation for photosynthesis: 6CO2 + 6H2O + light energy → C6H12O6 + 6O2.
Identify the reactants in the photosynthesis equation: carbon dioxide (CO2) and water (H2O).
Recognize that during the light-dependent reactions of photosynthesis, water molecules (H2O) are split in a process called photolysis.
Conclude that the oxygen gas (O2) released during photosynthesis comes from the splitting of water molecules (H2O), not from carbon dioxide, chlorophyll, or glucose.