Both processes use and make ATP but the way they do this are reversed. In cellular respiration, ATP is made by breaking down complex molecules. Photosynthesis on the other hand uses ATP to produce complex molecules.
<span>An important similarity between photosynthesis and cellular respiration is that both processes involve a chemical reaction where an energy source is taken and transformed into a resultant product. The two are also processes reliant on each other, in that the oxygen produced as a result of photosynthesis is then taken and transformed into the necessary reactant for cellular respiration, the waste product of which is carbon dioxide, the necessary reactant for photosynthesis. Although the two processes are the reverse of each other, the processes themselves are essentially doing the same thing. Hope this answers your question!</span>
