Examine the illustration below.Which statement best summarizes the contribution of Photosystem I (PSI)during photosynthesis?

Question

Quizplus · Accepted Answer

Photosystem I (PSI) is responsible for providing high-energy electrons to NADPH, which is then transported to the Calvin cycle to reduce carbon in CO₂. This process ultimately leads to the production of sugars and other organic compounds. The initial energy boost for electrons comes from Photosystem II (PSII), which generates ATP through the process of photophosphorylation. Therefore, option A is incorrect. While PSI does contribute to ATP synthesis, it does so indirectly by providing energy to the electron transport chain, which ultimately generates the proton gradient that drives ATP synthesis. Option B is therefore also incorrect. PSI does not regulate the transmembrane passage of protons through the thylakoid membrane, so option D is also incorrect.

Examine the Illustration Below