The light reactions of photosynthesis produce two key molecules that are essential for the next stage of photosynthesis, known as the light-independent reactions (also known as the Calvin cycle). These two molecules are:
-
NADPH - This is a reduced form of nicotinamide adenine dinucleotide phosphate, which acts as an electron carrier. It is produced during the light-dependent reactions when NADP+ is reduced, and is crucial for the reduction process in the Calvin cycle.
-
ATP - Adenosine triphosphate is the energy currency of the cell. It is generated during the light reactions and provides the energy needed for the synthesis of glucose and other carbohydrates in the Calvin cycle.
The light reactions convert solar energy into chemical energy stored in ATP and NADPH, which are then used in the light-independent reactions to convert carbon dioxide into glucose.
Regarding your provided options, the correct pair is: NADPH and ATP.