10. Light reaction is light dependent process in which light absorption, hydrolysis of water molecule, release of oxygen and formation of ATP & NAPDH occurs.
In dark reaction, which not dependent on the presence of light directly is also called as carbon fixing stage. In this stage the products of light reactions are used to form the carbohydrates.
The molecule required for both the reaction is chlorophyll.
12. Glucose is the primary source of energy for most of the cells and hence is required by all the cells. We get the energy by breaking down the glucose molecule into pyruvate in the process of glycolysis which is further processed to release ATP that is used as the energy currency in our cells.
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