Photosynthesis. Autotrophs and Heterotrophs Autotrophs are organisms that make their own food Heterotrophs are organisms that need to ingest food to obtain.

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Presentation transcript:

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

Happens here = chloroplast

Leaf Plant Cell chloropl ast

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

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

Photosynthesis Photosystem II Photosystem I In thylakoid membrane (aka… The Calvin Cycle) In stroma

2 Photosystems in thylakoid

In thylakoid membrane P680 photons P680 ETR ATP P700 ETR ATP Photosystem IIPhotosystem I NADPH

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

Hydrogen ions flow through a channel in the thylakoid membrane ATP synthase attached to the channel makes ATP How ATP made in light rxn?

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