19756708
Light stage
- Light Dependent (grana of chloroplast)
- Ingredients: Water, Light, Chlorophyll
- 1. Light is absorbed
- Chlorophyll
- Photolysis
- Chlorophyll
- 2 Pathways
- Pathway 1 (cyclic)
- electrons absorb
the light energy
- high energy electrons
transferred along
electron aceptors and
back to chlorophyll
- as it moves excess
energy is released
which is used to
make ATP from ADP
- as it moves excess
energy is released
which is used to
make ATP from ADP
- high energy electrons
transferred along
electron aceptors and
back to chlorophyll
- electrons absorb
the light energy
- Pathway 2
(non-cyclic)
- 2 electrons absorb
light energy
- high energy electrons
do not return to
chlorophyll
- as it moves, excess
energy is released
which is used to
make ATP and ADP
- the electrons
combine with
NADP+ and a
proton to form
NADPH
- the electrons
combine with
NADP+ and a
proton to form
NADPH
- as it moves, excess
energy is released
which is used to
make ATP and ADP
- high energy electrons
do not return to
chlorophyll
- 2 electrons absorb
light energy
- Pathway 1 (cyclic)
- 3. Products
- ATP: gives energy to
dark stage reactions
- NADPH: supplies
protons and
enegised
electrons for dark
stage reactions
- O2: respiration/
released to
atmosphere
- ATP: gives energy to
dark stage reactions
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