how are photosynthesis and respiration related to the carbon cycle?
Best Answer: The Carbon Cycle is a complex series of processes through which all of the carbon atoms in existence rotate. As both photosynthesis and cellular respiration use carbon atoms in their reactions (6 CO2 + 6 H2O (+ light energy) C6 H12 O6 + 6 O2 and C6 H12 O6 + 6 O2 6 CO2 + 6 H2O, respectively) both play a fundamental role in the carbon cycle. Photosynthesis And Respiration Cycle. This Site Might Help You.