During photosynthesis, which gas is released as a byproduct?

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Multiple Choice

During photosynthesis, which gas is released as a byproduct?

Explanation:
During photosynthesis, light energy drives the splitting of water in the light-dependent reactions. When water is split, oxygen gas is produced and released as a byproduct, while the remaining electrons and protons help generate ATP and NADPH to power the synthesis of glucose from carbon dioxide. The overall process uses carbon dioxide as a reactant, not a product, so oxygen becomes the gas that escapes from the plant. The other gases listed—carbon dioxide, nitrogen, and methane—are not produced as byproducts of photosynthesis in this context.

During photosynthesis, light energy drives the splitting of water in the light-dependent reactions. When water is split, oxygen gas is produced and released as a byproduct, while the remaining electrons and protons help generate ATP and NADPH to power the synthesis of glucose from carbon dioxide. The overall process uses carbon dioxide as a reactant, not a product, so oxygen becomes the gas that escapes from the plant. The other gases listed—carbon dioxide, nitrogen, and methane—are not produced as byproducts of photosynthesis in this context.

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