Photosynthesis Chapter 10. Photosynthesis occurs in the chloroplast. Chloroplast = type of plastid. Proplastid Chloroplasts Chromoplasts Amyloplasts. When photosynthetic pigments absorb photons, four things can happen:. Photon re-emission (fluorescence) Heat generation
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Chloroplast = type of plastid
Photon re-emission (fluorescence)
Energy transfer (resonance transfer)
Multiple pigments allow more light to be harvested.
RC absorbs at 700 nm (PS I)
RC absorbs at 680 nm (PS II)
PS I Involved with the reduction of NADPH for use in carbohydrate synthesisPS II Involved with ATP synthesis for use in carbohydrate production
Two Distinct Photosystems
Fixation of 1 CO2 molecule requires 3 ATP + 2 NADPH