Download What role do pigments play in the process of photosynthesis

What role do pigments play in the process of photosynthesis?
Photosynthetic organisms capture energy from sunlight with pigments.
Photon a packet of light energy.
White light is composed of ROYGBIV.
Green light is not absorbed by pigments but Violet and red are the most absorbed.
Pigment –light absorbing molecule
Chlorophyll- principle pigment found in chloroplast to make ATP
The two types of chlorophyll found in plants, chlorophyll a and chlorophyll b, absorb light very well in the blue-violet and
red regions of the visible spectrum, but not in the green region, as shown in the graph. Leaves reflect green light, which
is why plants look green.
Granum- several thylakoids
Thylakoid- a single disc where
photosynthesis takes place (Light
reaction)
Stroma- the space (cellular fluid)
within the chloroplast (dark reaction)
ATP
The ATP is adenosine Triphosphate
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Aden-(adenine base)
Osine-(ribose sugar)
Tri-( three)
Phosphate- (the compound phosphate)
The energy is in the bond
How is ATP used in body?
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Stores energy
Releases energy
Biochemical reactions
a) Movement
b) Digestion
c) Nervous system
d) Transportation
e) Enzymatic Reactions
Bigger Battery
NADPH is equal to 3 ATP
NADP+ (nicotinamide adenine dinucleotide phosphate) is a carrier molecule.
a. NADP+ accepts and holds two high-energy electrons, along with a hydrogen ion (H+). In this way, it is converted into
NADPH.
b. The NADPH can then carry the high-energy electrons to chemical reactions elsewhere in the cell.
Photosynthesis
Carbon dioxide enters the
cycle
Sugar is
made and
oxygen
released
Uses light energy to
recharge batteries
1. Light is used to break water into Electrons, Oxygen and Hydrogen (H2O Light O2 + H2 + electrons)
2. Electron carriers transport electrons to the next power station (photosystem I) and hydrogen is pumped into the
thylakoid. Some energy is used pumping the hydrogen into the thylakoid thus creating a concentration gradient
3. Light energy is once again used for recharging the electron to a higher charge
4. The super charged electrons are transported by carrier proteins to the last carrier where the electrons are used
for charging NADP+ to NADPH
5. The hydrogens in the thylakoid fall through the ATP Synthase (wheel generator) creating ATP
ATP Synthase
Photosynthesis