Sunday, August 2, 2015

Do plants undergo photosynthesis or cellular respiration or both?

Plants undergo both the photosynthesis and cellular respiration. Plants (containing chlorophyll) undergo photosynthesis in the presence of sunlight to generate food and oxygen, as per the following chemical reaction:



The food thus generated is then broken down in the process of cellular respiration to generate energy, as per the following chemical reaction:



The energy is generated in the form of adenosine triphosphate (ATP) molecule, which convert to ADP molecules and releases energy. 


Both the food and energy are key requirement of any organisms and plants are no different. If we look carefully, we can notice that photosynthesis and cellular respiration are complementary process, that is products of one are reactants for the other process. Plants carry out cellular respiration all the time for generating energy, in order to carry out various operations. However, the process of photosynthesis is dependent on sunlight and takes place during few hours only.



Hope this helps 

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