Cell Energy: Class Notes 2
Photosynthesis
Part 1
I. Photosynthesis happens in the
chloroplasts
II. Ingredients for Photosynthesis
A. Plants take in
carbon-dioxide
(CO2) and water
(H2O) and create
glucose(C6H12O6)
and oxygen gas(O2)
The equation is
6CO2+6H20→C6H12O6+6O2
B. Two Parts of Photosynthesis
1. Light Dependent
Reactions- Convert
light energy to
chemical energy
through an electron
transport chain
2. Light Independent
Reactions- Use the
chemical energy to
make glucose in the
Calvin Cycle
III. Light Dependent Reactions
A.
Chlorophyll in
the thylakoid
membrane of
the chloroplast
trap the energy
from sunlight.
B. The energy from the sun is passed to an
electron. It becomes excited and travels
through an electron transport chain.
C. At the end of the
chain, the excited
electron is given to a
molecule called
NADP+.
D. The NADP+ takes
the excited electron,
and 2 hydrogens from
water, becoming
NADPH.
E. ATP is created,
and oxygen is
released.
F. The ATP and
NADPH are
passed to the
next phase in
photosynthesis.
Summary
What do plants need for photosynthesis, and
what do they produce?
What are the 2 parts of photosynthesis?
What does the first part of photosynthesis
create?