Biologists Believe That in the Earliest Version of Photosynthesis the Energized

question 2

Multiple Choice

Biologists believe that in the earliest version of photosynthesis the energized photosystem electron simply cycled back to the chlorophyll molecule. What limitations would such a system impose?

• A)No molecular oxygen would be generated.
• B)No electrons would be available to reduce the carbon in CO₂.
• C)Cells could produce ATP but not sugars.
• D)all of the above

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