Choose the event that does not occur in photosynthesis (a) Absorption of light energy by chlorophyll (b) Reduction of carbon dioxide to carbohydrates (c) Oxidation of carbon to carbon dioxide (d) Conversion of light energy to chemical energy

d) Oxidation of carbon to CO2.


Photosynthesis is the process by which plants use sunlight, water, and carbon dioxide to create oxygen and energy as sugar. 

  • Photosynthesis is the process of preparing food in the presence of sunlight and chlorophyll.
  • In this process, the plant uses water from the soil, carbon dioxide from the air, and energy from sunlight to prepare glucose.
Carbon dioxide + Water + light energy → Glucose + Oxygen
  • During the initial phase of photosynthesis, light energy is harvested to produce ATP and NADPH where water is oxidized to provide electrons and protons.
  • After the formation of ATP and NADPH, carbon dioxide is reduced to carbohydrates (glucose)
  • The reduction of carbon dioxide to carbohydrates doesn’t directly depend on the presence of sunlight but on the supply of ATP and NADPH that were formed during the initial phase.

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