Multiple Choice
In the context of photosynthesis, what is the primary energy input that drives the light-dependent reactions?
9. Photosynthesis
Introduction to Photosynthesis
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During oxygenic photosynthesis in most plants, what gas is released from the plant as a byproduct?
A
Nitrogen (N2)
B
Carbon dioxide (CO2)
C
Methane (CH4)
D
Oxygen (O2)
Verified step by step guidance1
Understand the process of oxygenic photosynthesis, which occurs in most plants and involves converting light energy into chemical energy.
Recall that during photosynthesis, plants take in carbon dioxide (CO2) and water (H2O) to produce glucose (C6H12O6) and release a gas as a byproduct.
Identify the gas released as a byproduct by examining the overall photosynthesis equation: \$6\,CO_2 + 6\,H_2O + light \ energy \rightarrow C_6H_{12}O_6 + 6\,O_2$.
Note that oxygen (O2) is released from water molecules during the light-dependent reactions of photosynthesis.
Conclude that the gas released from the plant as a byproduct of oxygenic photosynthesis is oxygen (O2).
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