Both photosynthesis and respiration require specific catalyst. Why not the other answer? (1) only photosynthesis require the sun as a source of energy,respiration use glucose. (2) photosynthesis result in the formation of glucose,respiration result in the formation of carbon dioxide. (3)Only respiration occur in the mitochondria,photosynthesis occur in the stroma of the chloroplast. Answer is 2 because both of them require specific enzyme and as you know enzymes are biological catalyst.
