Question

what is fate of o₂ produced during the light reactions?
it is converted into co₂
it diffuses out of the leaf cells
it is used in calvin cycle
it is used as a final electron acceptor
it is reduced to water

Explanation:

During the light reactions of photosynthesis, water is split, releasing oxygen (\(O_2\)) as a by - product. This oxygen is not converted into \(CO_2\) (that's part of respiration in a different context). The Calvin cycle uses \(CO_2\) and ATP/NADPH (from light reactions) to make glucose, not \(O_2\). In cellular respiration, oxygen is the final electron acceptor, but this is about photosynthesis. Also, oxygen is not reduced to water in the light reactions (water is split to form oxygen). The oxygen produced in the light reactions of photosynthesis simply diffuses out of the leaf cells as a waste product (or a product that is released into the atmosphere).

Answer:

it diffuses out of the leaf cells