Analysis of a plant’s leaf showed an unusually high amount of ATP, but relatively little NADPH. Which electron transport method is probably working much more predominantly in this leaf? Which photosystem is probably absorbing more light energy? Explain your answer.

Cyclic electron transport is likely working much harder in a leaf with an unusually high amount of ATP and relatively little NADPH than the linear electron transport chain, since cyclic electron transport creates ATP, but not NADPH. Photosystem II does not factor into cyclic electron transport, so photosystem I is absorbing more light energy than photosystem II.