Question

unit 2 exam 2025 - 26
which of the following is not a step in the light - dependent reactions?
high - energy electrons move through the electron transport chain.
pigments in photosystem ii absorb light.
atp synthase allows h+ ions to pass through the thylakoid membrane.
atp and nadph are used to produce high - energy sugars.

Explanation:

In the light - dependent reactions of photosynthesis, high - energy electrons move through the electron transport chain, pigments in photosystem II absorb light, and ATP synthase allows H+ ions to pass through the thylakoid membrane to generate ATP. The use of ATP and NADPH to produce high - energy sugars occurs in the light - independent reactions (Calvin cycle), not in the light - dependent reactions.

Answer:

ATP and NADPH are used to produce high - energy sugars.