Photosystem I Function

PSII

Complex that oxidizes water

Electronegative

State when excited electrons leave PSII

Water

Source from which PSII pulls electrons

Oxygenic photosynthesis

Process producing oxygen as a byproduct

Cyanobacteria and eukaryotic chloroplasts

Organisms performing oxygenic photosynthesis

Anoxygenic photosynthesis

Photosynthesis without oxygen production

Purple photosynthetic bacteria and purple sulfur bacteria

Organisms performing anoxygenic photosynthesis

Single photosystem (only photosystem I)

Number of photosystems in anoxygenic photosynthesis organisms

Photosystem I

Transfers excited electrons to NADP+

Absorb photons in antennae complex

First key step of Photosystem I

Electrons in reaction center are excited

Second key step of Photosystem I

Excited electrons passed through carriers to ferredoxin

Third key step of Photosystem I

NADP+ reduced to form NADPH

Fourth key step of Photosystem I