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Photosynthesis an
overview Chlorophyll and Chloroplasts
Light energy from the sun travels
to the earth in the form of light. White light is a mixture of
different wavelengths.
Pigment plants gather the sun's
energy with light absorbing molecules called pigments photosynthetic
organisms capture energy from sunlight with pigments. The plants
principal pigment is chlorophyll. There are two types of chlorophyll
implants chlorophyll a and chlorophyll B.
Chloroplasts photosynthesis takes
place inside organelles called chloroplasts. Chloroplasts contains
thylakoids the fluid portion of the chloroplast is known as the stroma.
Energy collection chlorophyll
absorbs visible light especially well the energy is transferred
directly to electrons in the chlorophyll molecule itself light energy
can produce a steady supply of high-energy electrons which is what
makes photosynthesis work
High-energy electrons the
high-energy electrons produced by chlorophyll are highly reactive and
require a special carrier. An electron carrier is a compound that can
accept a pair of high-energy electrons and transfer them along with
most of the energy to make a molecule what are these molecule carriers
is NADP
Photosynthesis That uses the
energy of sunlight to convert water and carbon dioxide reactants into
high-energy sugars and oxygen products
Carbon dioxide plus water makes
sugars plus oxygen
Light dependent reactions are the
first set of reactions they require the direct involvement of light
and light absorbing pigments oxygen is released as a byproduct
light independent reactions ATP
and NADPH molecules produced in the light dependent reactions are used
to produce high-energy sugars from carbon dioxide.
Byproduct means anything produced
in the course of making something else
Analogy NADP is a carrier molecule
that transport pairs of electrons and is similar to how an of and it
is used to transport a hot object like a baked potato the heat is each
the potato is to ease in the oven mitt is NADP+ went to pick up the
potato the heat is transferred on to the oven mitt
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