Examine the Illustration Below; Which Statement Best Summarizes the Contribution

question 32

Multiple Choice

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

• A)PSI provides the initial energy boost to the electrons on their way to Photosystem II (PSI
• I).
• B)PSI generates the excited electrons that initially accumulate within the thylakoid space and eventually drive ATP synthesis.
• C)PSI generates the high-energy electrons that are transported by NADPH to the Calvin cycle and will eventually reduce the carbon in CO₂.
• D)By cycling between reduced and oxidized states, PSI regulates the transmembrane passage of protons between the stroma and the thylakoid space.