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AP Biology Chapter 10
Terms in this set (41)
self-feeder; plants; sustain selves without eating anything derived from other living things
live on compounds produced by other organisms
tissue of the interior leaf; chloroplasts found mainly in cells of this
carbon dioxide enters leaf and oxygen exits by way of these microscopic pores
a chloroplast has an envelope of two membranes surrounding this dense fluid
made of sacs suspended within stroma; segregates stroma from thylakoid space inside these sacs
the green pigment that gives leaves their color, resides in the thylakoid membranes of the chloroplast
6CO2 + 6H2O -> C6H12O6 + 6O2
segment most important to life; 380 nm to 750 nm
substances that absorb visible light
participates directly in light reactions; reflect or transmit blue green
reflect or transmit olive green
hydrocarbons that are various shades of yellow and orange because they absorb violet and blue-green light; photoprotection
absorb and dissipate excessive light energy that would otherwise damage cholorphyll or interact with oxygen, forming reactive oxidative molecules that are dangerous to the cell
Photon of Light Excites Chlorophyll
when pigment molecule absorbs a photon of light, one of the molecule's electrions is elevated to a higher energy state (higher energy state=more potential energy); cannot remain there for long (unstable); electron immediately drops back down to the ground level and releases energy
composed of a reaction-center complex surrounded by several light-harvesting complexes
The light reactions occur within the the _________ membranes, and use a light absorbing pigment called _________.
The main objective of the light reactions is to make ______ and __________ for the Calvin Cycle.
Primary electron acceptor
As the P680 pair is excited, an electron is sent to the ______________.
The energy to remove an electron from the pair of P680 chlorophyll molecules in PSII comes from light excited chlorophyll in light harvesting complex.
The ETC in PSII generates ________ for the Calvin Cycle.
The ETC in PSI generates _________ for the Calvin Cycle.
The constant supply of electrons for the light reactions is possible through the splitting of water at PSII.
Reducing CO2 to make sugar is not the main objective of the Calvin Cycle
The reducing power to synthesize sugar in the Calvin Cycle does not come from the oxidation of NADPH.
The energy to make molecular conversions in the Calvin Cycle comes from ATP hydrolysis.
What compound necessary for photosynthesis is contained in the thylakoids?
Where in the organelle are H2O and CO2 stored before they are used in photosynthesis?
Is photosynthesis an endergonic or exergonic reaction?
What is the energy source for photosynthesis?
In what part of the chloroplast do the light-dependent reactions occur?
In what part of the chloroplast do the light-independent reactions occur?
What compound is best able to absorb the light energy from the Sun and convert it into chemical energy?
Where are electrons released from water molecules?
O2 and H+
When the electrons are released from water molecules, what other products are formed?
Is carbon dioxide involved in the light-dependent rection?
Where do the ATP and NADPH produced during the light-dependent reactions go when the process is complete?
What molecule(s) are regenerated in the regeneration phase of the Calvin Cycle?
removal of electrons from chlorophyll molecules
Which process is most directly driven by light energy?
The source of the oxygen produced by photosynthesis has been identified through experiments using radioactive tracers. The oxygen comes from _____.
What structure is formed by the reaction center, light-harvesting complexes, and primary electron acceptors that cluster, and is located in the thylakoid membrane?
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