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Q93
(NDA-II/2023)
Science & Technology › Basic Science (Physics, Chemistry, Biology)
Official Key
Which one of the following is NOT a requirement for photosynthesis ?
Result
Your answer:
—
·
Correct:
D
Explanation
Photosynthesis is the biological process by which green plants and certain other organisms transform light energy into chemical energy. The essential requirements for this process are chlorophyll, carbon dioxide (CO2), water (H2O), and sunlight.
The chemical equation for photosynthesis is: 6CO2 + 6H2O + Light Energy → C6H12O6 + 6O2.
- Chlorophyll: Absorbs light energy necessary for the reaction.
- CO2 and Water: Act as the primary raw materials (reactants) to synthesize glucose.
- Oxygen (O2): It is not a requirement; instead, it is a by-product released into the atmosphere during the light-dependent stage of photosynthesis (specifically through the photolysis of water).
Since oxygen is produced as a result of the process rather than being consumed to start it, it is not a requirement for photosynthesis.
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