Question

what are the two main outputs of the light reactions?
phosphorus and nitrogen
water and atp
atp and nadph
oxygen and carbon dioxide

Explanation:

In photosynthesis light - reactions, energy from sunlight is used to produce ATP (adenosine triphosphate) and NADPH (nicotinamide adenine dinucleotide phosphate hydrogen). These are energy - carrying molecules used in the Calvin cycle (dark reactions). Phosphorus and nitrogen are elements not main products. Water is a reactant not a main product, and carbon dioxide is involved in the dark reactions, not a main light - reaction product. Oxygen is also produced but ATP and NADPH are the main energy - related outputs.

Answer:

ATP and NADPH