Final answer:
The light-dependent reactions of photosynthesis occur in the thylakoid membranes of chloroplasts where chlorophyll is also located.
Step-by-step explanation:
The light-dependent reactions of photosynthesis occur in the thylakoid membranes of chloroplasts. These reactions involve the absorption of light energy by pigments, such as chlorophyll, which are also located in the thylakoid membranes.