Endothermic and ExothermicExplain how endothermic and exothermic relate to cellular respiration and photosynthesis.

An endothermic reaction needs to absorb energy in order
for it to be able to proceed and an exothermic reaction releases heat as a result of
this chemical reaction. If you consider photosynthesis, light or radiant energy is
required for this reaction to occur. It must be absorbed by the chlorophyll pigment in
the chloroplasts of the plant cells. After that occurs, the light reaction can proceed
and water molecules are split into hydrogen and oxygen atoms. Then, the dark reactions
allow carbon fixation to occur, forming glucose. Oxygen and water are also released.
This would not be possible without the radiant energy being absorbed. Cellular
respiration, on the other hand is exothermic. Glucose and oxygen combine in the
mitochondria of cells and the end result is the release of carbon dioxide and water
which are waste products, the production of A.T.P, a high energy molecule, and heat is
also released.