Q. 7

List the important events and end products of the light reaction?

Answer :

Important light reaction events and final products are as follows. It is important to note that these events are not the order in which they happen but the order in which the scientists discover them.

Light absorption: The Light Harvesting Complex (LHC) performs light absorption.


Each photosystem has a light harvesting system of all pigments (except one chlorophyll-a molecule). The antennas are also known as these pigments. These pigments absorb light from different wavelengths to improve the efficiency of the system. As a reaction centre, the single chlorophyll a molecule works.


Water division: sunlight energy is used to divide the water molecule into hydrogen ion and


NADP+ to NADPH is used for the extra electron released after the split.


Oxygen release: after division of the water molecule oxygen discharges into the stomach.


High-energy intermediate formation (ATP and NADPH): two energy-rich combinations ATP and NADPH are formed at the end of an electricity reaction.


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