What are the main products of the light-dependent reactions of photosynthesis?

The main products of the light-dependent reactions of photosynthesis are ATP, NADPH, and oxygen. During these reactions, which take place in the thylakoid membranes of chloroplasts, light energy is absorbed by chlorophyll and other pigments. This energy is utilized to split water molecules, releasing oxygen as a by-product.

In addition to producing oxygen, the absorbed light energy drives the transfer of electrons through a series of proteins known as the electron transport chain. This process allows for the generation of ATP through a mechanism called photophosphorylation. Similarly, NADP+ is reduced to NADPH by the addition of electrons, which is essential for the subsequent light-independent reactions (Calvin cycle) to occur.

Thus, the correct answer highlights the crucial role of ATP and NADPH as energy carriers that support the formation of glucose later in the photosynthetic process, while oxygen serves as a vital by-product released into the atmosphere.