This document provides an overview of photosynthesis, including: - The two pathways of photosynthesis (light reactions and Calvin cycle) that convert solar energy to chemical energy. - The structure and function of chloroplasts, where the light reactions take place in the thylakoid membranes and the Calvin cycle occurs in the stroma. - The light-dependent reactions that use photon energy to produce ATP and NADPH via photosystems and electron transport chains, and the light-independent Calvin cycle that fixes carbon into glucose using ATP and NADPH.