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(B) During the process of photosynthesis,water $(H_2O)$ undergoes photolysis (splitting of water) in the presence of light.This process releases elect

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Hydrogen

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(B) During the process of photosynthesis,water $(H_2O)$ undergoes photolysis (splitting of water) in the presence of light.This process releases electrons,protons ($H^+$ ions),and oxygen $(O_2)$.The protons $(H^+)$ derived from water are used to reduce $NADP^+$ to $NADPH$,which is then utilized in the Calvin cycle for the reduction of $CO_2$ to form glucose $(C_6H_{12}O_6)$.Therefore,the hydrogen atoms (as protons and electrons) required for the synthesis of glucose are obtained from water.The reaction is: $2H_2O \rightarrow 4H^+ + 4e^- + O_2$.

During the formation of glucose,which of the following is obtained from water?

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