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Photosynthesis

Photosynthesis. Autotrophs and Heterotrophs. Autotrophs are organisms that make their own food Heterotrophs are organisms that need to ingest food to obtain energy. How are they related??. Autotrophs. Photosynthesis.

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Photosynthesis

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  1. Photosynthesis

  2. Autotrophs and Heterotrophs • Autotrophs are organisms that make their own food • Heterotrophs are organisms that need to ingest food to obtain energy

  3. How are they related??

  4. Autotrophs

  5. Photosynthesis • How plants (and some other organisms) use light to convert water and carbon dioxide into oxygen and sugar!

  6. Happens here = chloroplast

  7. Leaf Plant Cell chloroplast

  8. Chloroplasts have chlorophyll (pigment) This is why chloroplasts are green, why leaves are green

  9. Chloroplast Stroma Outer membrane intermembrane space Inner membrane grana thlakoid Lumen (inside thylakoid)

  10. Photosynthesis Light reactions Photosystem II Photosystem I In thylakoid membrane Dark Reactions (aka… The Calvin Cycle) In stroma

  11. 2 Photosystems in thylakoid Light reactions

  12. Light reactions In thylakoid membrane ATP P680 P700 ATP NADPH ETR ETR photons P680 P700 Photosystem II Photosystem I

  13. NOTE…… Electron Carriers are NADP …… b/c can become NADPH

  14. How ATP made in light rxn? • Hydrogen ions flow through a channel in the thylakoid membrane • ATP synthaseattached to the channel makes ATP

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