Answer:
The correct answer is B. oxidized...reduced
Explanation:
In a redox reaction, oxidation and reduction occur in the same reaction by transferring an electron from one chemical species and accepting of electron form another chemical species.
Photosynthesis is a redox reaction in which the water molecule releases electrons and converts into Oxygen molecule during the light reaction and carbon dioxide is reduced to carbohydrate by using the electrons released by NADPH molecules during Calvin cycle.
Therefore photosynthesis is a redox reaction in which H20 is oxidized and CO2 is reduced.
In photosynthesis, H2O is OXIDIZED during the light reactions and CO2 is REDUCED during the Calvin cycle.
Photosynthesis is a series of oxide-reduction (redox) reactions by which plants can produce sugar (simple carbohydrates) and oxygen by using sunlight, water and carbon dioxide (CO2).
These redox reactions involve the transfer of electrons from one molecule to another.
The molecule that loses electrons is oxidized, while the molecule that gains electrons is reduced.
Photosynthesis has two main types of reactions: light-dependent reactions and light-independent reactions (i.e., the Calvin cycle).
During light-dependent reactions, H2O loses electrons to synthesize ATP, whereas during the Calvin cycle CO2 gains electrons to create simple carbohydrates (glucose).
In conclusion, in photosynthesis, H2O is OXIDIZED during the light reactions and CO2 is REDUCED during the Calvin cycle.
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