Question

Which of the following does not occur in photosynthesis?
a. Conversion of light energy to chemical energy
b. Oxidation of carbon dioxide to glucose
c. Photolysis of water
d. Absorption of light energy by chlorophyll​

Answer 1

The event the does not occur during photosynthesis is- b. Oxidation of carbon dioxide to glucose.

• Photosynthesis is the anabolic process in which green plants make their food in the presence of sunlight using carbon dioxide and water. Oxygen is released in this process. The chlorophyll helps in trapping light energy.
• During photosynthesis, light energy is used to produce ATP and NADPH and in the splitting of water molecules. ATP and NADPH help in the reduction of carbon dioxide to glucose. Hence, in photosynthesis, light energy is converted into chemical energy.

Answer 2

Of the following b. Oxidation of carbon dioxide to glucose does not occur in photosynthesis

• Carbon dioxide is reduced to sugars during photosynthesis. The resultant molecules are subsequently reduced and eliminated to make more carbohydrates, such as glucose, using the ATP and NADPH produced by the light-dependent processes.
• While on the other hand, the oxidation of oxygen from water is the photo component of photosynthesis. The oxygen in water is oxidised because each O atom loses two electrons.
• Hence, Carbon dioxide is reduced while water is oxidised. So, option b is an incorrect statement and correct answer.