During photosynthesis, which gas is released as a product?

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Multiple Choice

During photosynthesis, which gas is released as a product?

Explanation:
In photosynthesis, the energy from light drives the splitting of water in the light-dependent reactions. This process, called photolysis, releases oxygen gas as a byproduct while electrons go to the electron transport chain and protons contribute to ATP and NADPH formation. The oxygen comes from water, not from carbon dioxide, which is instead used later in the Calvin cycle to build sugars. Nitrogen and methane aren’t produced or released in this pathway, so they aren’t the gases involved. Therefore, the gas released is oxygen.

In photosynthesis, the energy from light drives the splitting of water in the light-dependent reactions. This process, called photolysis, releases oxygen gas as a byproduct while electrons go to the electron transport chain and protons contribute to ATP and NADPH formation. The oxygen comes from water, not from carbon dioxide, which is instead used later in the Calvin cycle to build sugars. Nitrogen and methane aren’t produced or released in this pathway, so they aren’t the gases involved. Therefore, the gas released is oxygen.

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