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Electron Flow in Photosynthetic Bacteria

View the animation below, then complete the quiz to test your knowledge of the concept.

1Which of the following represents a correct sequence during photosynthesis in cyanobacteria?
A)Photosystem I -> ATP production -> Photosystem II -> NADPH production
B)Photosystem I -> NADPH production -> Photosystem II -> ATP production
C)Photosystem II -> ATP production -> Photosystem I -> NADPH production
D)Photosystem II -> NADPH production -> Photosystem I -> ATP production
E)Photosystem I  Photosystem II  ATP production  NADPH production

2In which of the following ways is bacterial photosynthesis different from plant photosynthesis?
A)bacterial photosynthesis uses only one photosystem
B)bacterial photosynthesis does not produce oxygen
C)bacterial photosynthesis does not produce ATP
D)A and B
E)A, B and C

3The photosynthetic bacterium Chlorobium uses
A)H2S as an electron donor forming elemental sulfur as a byproduct.
B)elemental sulfur as an electron donor forming H2S as a byproduct.
C)NADH as an electron donor forming NAD+ as a byproduct.
D)NAD+ as an electron donor forming NADH as a byproduct.
E)NADP+ as an electron donor forming NADPH as a byproduct.

4The photosynthetic bacterium Rhodobacter sphaeroides uses bacteriopheophytin and ubiquinone as electron carriers.

5In reverse electron flow, ATP hydrolysis provides the energy to convert NADH to NAD+.

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