alleryWhich gas is released as a by-product of photosynthesis?
AHydrogen from the splitting of glucose
BCarbon dioxide from leaves at night
CNitrogen from the surrounding air
DOxygen from the splitting of water
Answer & Solution
Correct answer: D. Oxygen from the splitting of water
1. Water molecules are split during the light reaction.
2. Hydrogen joins NADP to form NADPH.
3. Oxygen atoms combine to release O2 gas.
4. So oxygen is the by-product released.
_Source: Selina Concise Biology Class 10, Ch on Photosynthesis (Mistral OCR'd PDF), section on light reaction_
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