Some photosynthetic bacteria have only photosystem I, whereas cyanobacteria have both photosystems I and II. To determine whether a photosynthetic bacterium has only photosystem I or has both photosystem I and photosystem II, one should___ A.do experiments to generate an action spectrum. B. test for ability to reduce carbon. C. test for production of O2. D. determine if they have thylakoids in the chloroplasts. E. test for production of ATP. F. test for ability to reduce NAD+ or NADP+.

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