Photosynthesis Flashcards
Photosynthesis forms energy by
Photosynthesis
Captures energy from light turns into organic molecules
what is Photoautotrophs
use light as a
source of energy to synthesize
organic molecules
what is Chemoautotrophs
use inorganic energy sources such as hydrogen sulfide, elemental sulfur, ferrous iron, molecular hydrogen, and ammonia
what are Autotrophs
self feeders
what are Heterotrophs
other feeders, do not get energy from ligh
where does Photosynthesis occurs in
chloroplasts
What are Mesophyll cells and the stroma
Receive water, and little door ways that can let gasses in and out
Photosynthesis as a redox reaction
Endergonic and Not spontaneous (requires energy). 6 carbon +6 hydrogen +light energy.
Cellular respiration as a redox reaction
Basically reversed photosyntesis redox reaction
The “photo” part
light reactions. h2o source of electrons and proteins. ATP- chemical energy. NADPH- reducing power
The “synthesis”part
Calvin cycle
what happens to oxygen in “photo” part
oxygen become oxidized
whats happens to carbon
carbon becomes reduced
what is NADP+
electron carrier in photosynthesis
porphyrin ring purpose in harvesting light energy
light-absorbing head of molecule; magnesium atom center
Hydrocarbon tail purpose
interacts with hydrophobic regions of proteins in thylakoid membranes
what are photons and wavelengths
light behaves in particle-like photons. the shorter the wavelength the greater the energy of each photon
what is Chlorophyll b
absorbs light energy, has carbonyl group
what is Chlorophyll a
chlorophyll a is the primary pigment of photosynthesis. It’s responsible for absorbing light in the orange to red and violet to blue spectrum that provides the energy
what are Carotenoids
pigmants that are produced by plants and algae
what happens when a Chlorophyll molecule absorbs a photon of light
one of the molecules electrons get elevated to where it has more potential energy
what is a photosystem
complex where chlorophyll molecules are organized with other small molecules
what is the photoystem composed of
reaction center complex. light-harvesting complexes.
what is reaction-center complex
holds chlorophyll
a and the primary electron acceptor.
what is the primary electron acceptor
is a molecule
capable of accepting electrons and becoming
reduced
what is ight-harvesting complex
hold pigment
molecules bound to proteins that allow plant
to harvest light over larger area and larger
part of visible spectrum. They are the
antennae for the reaction center complex.
what is Linear electron flow
Energy is transferred as electrons move through
the photosystems and other molecules in the thylakoid membrane.
The Calvin Cycle components
Carbon enters the Calvin
cycle as CO2and leaves in the form of sugar. cycle expends ATP as an energy source and consumes NADPH adding high potential-energy electrons to make the sugar
what is Carbon fixation
Carbon fixation is the process of incorporating CO2into organic material
