Photosynthesis
photosynthesizing organisms can appear in exams instead of plants :
Algae, englena cyanobactena
-
,
basics
↳
photoautotrophs synthesise their own organic matter from inorganic molecules through photosynthesis
↳ which is transduces
requires energy from sunlight to electrical
energy then to chemical energy in glucose
6 CO2 + 6H20 -
>
C6H1286 + 602
why are leaves green ?
photosynthetic pigments eg Chlorophyll are found on the Thylakoid membranes in chloroplasts
-
Chlorophyl reflects green light so appears green
-
photosynthetic pigments
Chlorophyl
-
a
-
Chlorophyll b
-
carotenes and Xanthophyl
Ry values whole
thing
_
distance moved by pigment
distance moved by solvent front
↳ one colow
Absorption Spectrum
-graph showing how much light of different wavelengths is absorbed by a
pigment
Chlorophyll absorbs light in blue and red regions not
green
-
carotenes + Xanthophyl absorb in blue-green regions
Action spectrum
-graph showing rate of photosynthesis at different wavelengths of light
,Photosystems
photosynthetic pigments-chlorophyll a and b
carotenes
Xanthophylls
photosystem-arrangement of photosynthetic pigments within Thylakoid membrane
primary pigments >
-
2 forms of Chlorophyl A
antennae -
other forms of Chlorophyla b and carotenoids
,
LIGHT
i
·
anged int
,
an
(contains primary Pigment)
Light harvesting by photosystems
·
light energy is absorbed
antenna pigments molecules pass light energy to primary pigment in reaction centre
·
Primary pigment (Chlorophyla) contains a pair of electrons
·
·
light energy exites electron pair which are emitted from reaction centre
↳
light energy -
> elechical
energy
photosynthesizing organisms can appear in exams instead of plants :
Algae, englena cyanobactena
-
,
basics
↳
photoautotrophs synthesise their own organic matter from inorganic molecules through photosynthesis
↳ which is transduces
requires energy from sunlight to electrical
energy then to chemical energy in glucose
6 CO2 + 6H20 -
>
C6H1286 + 602
why are leaves green ?
photosynthetic pigments eg Chlorophyll are found on the Thylakoid membranes in chloroplasts
-
Chlorophyl reflects green light so appears green
-
photosynthetic pigments
Chlorophyl
-
a
-
Chlorophyll b
-
carotenes and Xanthophyl
Ry values whole
thing
_
distance moved by pigment
distance moved by solvent front
↳ one colow
Absorption Spectrum
-graph showing how much light of different wavelengths is absorbed by a
pigment
Chlorophyll absorbs light in blue and red regions not
green
-
carotenes + Xanthophyl absorb in blue-green regions
Action spectrum
-graph showing rate of photosynthesis at different wavelengths of light
,Photosystems
photosynthetic pigments-chlorophyll a and b
carotenes
Xanthophylls
photosystem-arrangement of photosynthetic pigments within Thylakoid membrane
primary pigments >
-
2 forms of Chlorophyl A
antennae -
other forms of Chlorophyla b and carotenoids
,
LIGHT
i
·
anged int
,
an
(contains primary Pigment)
Light harvesting by photosystems
·
light energy is absorbed
antenna pigments molecules pass light energy to primary pigment in reaction centre
·
Primary pigment (Chlorophyla) contains a pair of electrons
·
·
light energy exites electron pair which are emitted from reaction centre
↳
light energy -
> elechical
energy
