ADP + Pi + energy* ATP**Light energy from the sun
Energy captured from sunlightThis energy used to drive ATP synthesis
- light reactions
Energy in ATP used to drive the synthesis of organized molecules
6CO2 + 12 H2O + *energy glucose**Energy comes from the hydrolysis (breakdown) of ATP.
- light independent reactions
Chloroplast Structure 1. thylakoids
- chlorophyll pigments in membrane (photosystem)2. grana3. stroma
3. energy of the electron is passed through the system4. energy transferred to membrane-bound proteins on the thylakoid membrane
Pigments are molecules developed for absorbing photonsRetinal
found in the human retina absorbs light in the “visible spectrum”
Some organismal pigments absorb outside the visible spectrum
Chlorophyll is extremely efficient at capturing a narrow range of photons.
It excites an electron whose energy is passed through the pigment.
Carotenoids- absorb light at different wavelengths than chlorophyll- absorb blue and green and reflect orange and yellow
Making Glucose: C6H12O6
Need H1. there’s no H in CO2
2. reducing power- source of attachable H- from H2O
There is a different chlorophyll which absorbs another photon (Photosystem I).
excited electron on H atom transferred to NADP
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