Final answer:
A chloroplast contains an antenna complex and a reaction center, where the photochemistry takes place.
Step-by-step explanation:
A generalized chloroplast contains an antenna complex and a reaction center. It consists of multiple antenna proteins that contain a mixture of 300-400 chlorophyll a and b molecules as well as other pigments like carotenoids. The light-harvesting complex passes energy from sunlight to the reaction center where the photochemistry takes place.