During the light-dependent reactions of photosynthesis, which occur in the thylakoid membranes of chloroplasts, light energy is captured by chlorophyll and converted into chemical energy in the form of ATP and NADPH. Water molecules are split (photolysis), releasing oxygen as a byproduct. The absorbed light energy drives the electron transport chain, generating a proton gradient that aids in ATP synthesis via ATP synthase. These reactions are essential for powering the subsequent light-independent reactions (Calvin cycle) that produce glucose.
ATP and NADPH
ATP and NADPH
ATP and NADPH
The light-dependent reactions in photosynthesis generate oxygen from water. No ATP is produced during this step.
ATP and NADPH
Photosynthesis generates ATP during the light-dependent reactions (photophosphorylation) and NADPH during the light-dependent reactions (photolysis of water and reduction of NADP+ to NADPH).
oxygen
ATP and NADPH
ATP and NADPH
ATP and NADPH
ATP and NADPH
The two reactions which occur during photosynthesis are light reaction and dark reaction. Light reaction takes place only in the presence of light. Dark reaction can occur with or without light.
The hydrogen ions for the photosystems of the light-dependent reactions originate from water molecules during the process of photosynthesis.
photosynthesis or clorofil
The light-dependent reactions in photosynthesis generate oxygen from water. No ATP is produced during this step.
Mitochondria
ATP and NADPH