Answer:
ATP and NADPH
Explanation:
This is accomplished by the use of two different photosystems in the light reactions of photosynthesis, one to generate ATP and the other to generate NADPH. Electrons are transferred sequentially between the two photosystems, with photosystem I acting to generate NADPH and photosystem II acting to generate ATP
2 different types of photosystems are used:
- Photosystem 1 makes NADPH
- Photosystem 2 makes ATP
The transfer of electrons happen back to back
