Outline the process involved in the light and dark reactions of photosynthesis.

(i) Light reaction – light energy helps in breaking down water into hydrogen ions, oxygen and electrons. The reaction can also be referred to as photolysis of water.

(ii) Dark reaction – in dark reaction, carbon dioxide reacts with hydrogen in a complex series of small steps, each controlled by specific enzymes; producing glucose. The reaction can take place at night or in the day time.

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