At what stage of photosynthesis is oxygen released as a byproduct?
A
During glycolysis
B
During the light-dependent reactions
C
During the Krebs cycle
D
During the Calvin cycle
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1
Understand that photosynthesis consists of two main stages: the light-dependent reactions and the Calvin cycle (light-independent reactions).
Recognize that the light-dependent reactions occur in the thylakoid membranes of the chloroplasts and require light energy to proceed.
Know that during the light-dependent reactions, water molecules (H₂O) are split in a process called photolysis, which releases oxygen (O₂) as a byproduct.
Identify that the oxygen released during the light-dependent reactions is a result of the splitting of water molecules, which also provides electrons and protons for the subsequent steps of photosynthesis.
Conclude that oxygen is released during the light-dependent reactions of photosynthesis, not during glycolysis, the Krebs cycle, or the Calvin cycle.