Biology notes

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  • Created on: 30-05-12 11:52
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Thursday 15th September 2011
Pages 35
Pink book, lesson 2.
Photosynthesis
Reduction:
Gain ofe
Gain of
hydrogen
Loss of
oxygen
Oxidation:
Loss ofe
Loss of
hydrogen
Gain of
oxygen
A.T.P : adenosine triphosphate
F or
a
light dependent reac tion,
radiant energy
is
used.
These
reac t
ions
oc cur
i
n
t he
thylakoid membrane.
T here are tw o
stages
to
photosynthesis, light dependent which
occ ur
s i
n t he
thylakoid membrane,
and
light independent which
occur
s i
n t
he stroma.
Hydrogen atoms are
obtained from water
A.T.P and
reduced N.A.D.P ar
e
for
me d,
a s
w el
l
as
water as
a waste product.
T he
movement of protons i
s t
h e
mo veme nt
of
Hydrogen ions.
6CO2 + 6H2O C6H12O6 + 6O2
T he
Carbon Dioxide is
reduced ,
as
hydrogen i
s added.
The
reactions f
orm
C6H12O6.
D uri
ng
re act
ions,
bonds ar
e
broken and reformed (el
ect
rons mo ved)
.

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R ed uct
ion c an be carried
ou t
by
the addition of
hydrogen atoms.
T he hydrogen and e c
o me from water.
T he carbon dioxide an d
water do not c ome i
n contact d ur
ing
the r
e acti
o n.
T he organic materials ma d e
b y photosynthesis are
pa ssed
on t
h r
oug h food
webs.…read more

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