Photosynthesis Part Duex

Believe it or not, we did the first three sections of chapter 7 already ,[object Object],[object Object],[object Object]

7.4 Photosynthesis is a redox process ,[object Object],[object Object],[object Object],[object Object],Figure 7.4A Reduction Oxidation Figure 7.4B Oxidation Reduction

7.4 Photosynthesis is a redox process ,[object Object],[object Object],Figure 7.4A Reduction Oxidation Figure 7.4B Oxidation Reduction

[object Object],[object Object],[object Object],7.5 Overview: Photosynthesis occurs in two stages linked by ATP and NADPH

[object Object],[object Object],[object Object],[object Object],7.5 Overview: Photosynthesis occurs in two stages linked by ATP and NADPH

[object Object],Figure 7.5 Light Chloroplast LIGHT REACTIONS (in grana) CALVIN CYCLE (in stroma) Electrons H 2 O O 2 CO 2 NADP + ADP + P Sugar ATP NADPH

[object Object],7.6 Visible radiation drives the light reactions THE LIGHT REACTIONS: CONVERTING SOLAR ENERGY TO CHEMICAL ENERGY Visible light Wavelength (nm) Figure 7.6A Gamma rays X-rays UV Infrared Micro- waves Radio waves Chlorophyll a participates directly in light reactions Chlorophyll b does NOT participate in the light reactions

To Recap Pigments: ,[object Object],[object Object],Carotenoids: pass energy to Chlorophyll a, can absorb and dissipate excessive light that would damage chlorophyll.

Figure 7.6B Light Chloroplast Reflected light Absorbed light Transmitted light

7.7 Photosystems capture solar power ,[object Object],[object Object],[object Object],Figure 7.7B Primary electron acceptor Other compounds Chlorophyll molecule Photon

What’s in a photosystem? Figure 7.7C Primary electron acceptor Photon Reaction center PHOTOSYSTEM Pigment molecules of antenna

What’s in a photosystem? ,[object Object],[object Object],[object Object]

[object Object],Figure 7.7A Heat Photon (fluorescence) Photon Chlorophyll molecule ,[object Object]

Photosynthesis Part Duex

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