Question: what is the difference between the cyclic and noncyclic pathways of photosynthesis?
Answer: So in non-cyclic photophosphorylation, you make oxygen, from splitting the water molecule, you make ATP using the H+ ions and you make NADPH. In cyclic photophosphorylation, you only use photosystem I. There is no splitting of water - the electrons only come from the light harvesting complex.