Which gas is the reactant in the chemical reactions of photosynthesis? nitrogen air oxygen carbon dioxide

Carbondioxide (CO2)

Explanation:

Photosynthesis is a process peculiar to autotrophs like plants, algae etc. It is the process whereby inorganic molecules are used to synthesize organic molecule. It involves the use of light energy from the sun. Plants, as an autotroph, captures sunlight energy using its Chlorophyll pigment. It then uses this energy to power other processes in its cell (chloroplast).

Carbondioxide (CO2) and water are the major prerequisite for the formation of the organic molecule (glucose) during photosynthesis. CO2 gas is absorbed via the stomata of the plant's leaves. It is then fixed by a CO2 acceptor called RUBP, catalyzed by RUBISCO enzyme. The general photosynthetic equation is:

6CO2 + 6H2O > C6H12O6 + 6O2

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