In the "photo" reaction of photosynthesis, where does the energy to build ATP come from?

a) In the first electron transport chain, hydrogen ions are pumped into the thylakoid by high-energy electrons; the kinetic energy from the release of these ions builds ATP
b) In the NADPH-producing photosystem, the electrons from the electron transport chain produce energy upon being transferred
c) In the water-splitting photosystem, the electrons release energy upon being transferred to the electron transport chain


Answer: a) In the first electron transport chain, hydrogen ions are pumped into the thylakoid by high-energy electrons; the kinetic energy from the release of these ions builds ATP

Biology & Microbiology

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