2. Autotrophs are capable of making their own
carbohydrates for food
Heterotrophs cannot make their own
carbohydrates for food and must get them
from someone else
3. A process by which light energy is converted
to chemical energy in the form of sugar
Performed by photoautotrophs
Occurs in the chloroplast
5. Chlorophyll A
Light absorption
spectrum, chlor A
and chlor B
•The pigment responsible
for absorbing the sunlight
which drives photosynthesis
•Two forms, A and B
•Found in the chloroplast
6. 6CO2 + 12 H2O + light energy C6H12O6 +
6O2 + 6H2O
Relies on the excitation and transfer of
electrons
Occurs in 2 major stages: the light reactions
and dark reactions
7. Produced by the chemical reactions during
the light reactions
Capable of giving off LOTS of energy!
Significant in producing large molecules like
glucose
8. Light energy is
‘captured’
Generates excited
electrons
Excited electrons
‘captured’ by NADPH
NADPH
9. An excited electron carrier
Carries excited electrons from the thylakoid
membrane (where they are produced) to the
stroma (where they are used to make sugar)
10. PS2
PS1ATP made here!!!
NADPH made
here!!!!!!
•Photosystems: light energy collectors.
•This light energy is used to make ATP
and excited electrons
13. Excited electrons move through PS2 and then
PS1
After being sent up to the primary electron
acceptor for photosystem 1, the excited
electrons board the NADPH ‘bus’
14. The excited electrons flow through
photosystem 2 repeatedly to make lots of
ATP
15. Light INdependent
Sugar formation occurs here!
Energy given off by excited electrons used to
combine water and carbon dioxide to form
sugars
Occurs in the stroma of the chloroplast
