5) Which of the following are products of the light reactions of photosynthesis that are utilized in the Calvin cycle? 6) What is the primary function of the light reactions of photosynthesis? 7) What are the products of the light reactions that are subsequently used by the Calvin cycle? 8) Where does the Calvin cycle take place? 9) A plant has a unique photosynthetic pigment. The leaves of this plant appear to be reddish yellow. What wavelengths of visible light are not being absorbed by this pigment?