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Lab Exercise 10
Photosynthesis
16
Biology
Undergraduate 3
03/25/2012

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Term
Photosynthesis, along with oxidative phosphorylation uses ____ _____ to elicit a transport of _______ across a membrane, setting up a ______ _____ gradient.
Definition
-electron transfer
-Protons
-Proton concentration
Term
The process was originally called a chemiosmotic gradient, which is now seen in...
Definition
bacteria, mitochondria, chloropasts
Term
As protons diffuse through membrane bound channels the energy is coupled with...
Definition
the phosphorylation of ADP, producing ATP.
Term
Where does the concentration gradient occur in chloroplasts?
Definition
across the thylakoid.
Term
what type of energy fuels photosynthesis?
with this energy sugars and other molecules are created from...?
Definition
Light, CO2 and H2O.
Term
What energy associated molecules drives photosynthesis?
Definition
ATP and NADPH
Term
Initial event in Photosynthesis is the absorption of a _____ OF ______ by which photopigments?
Definition
photon light
Chlorophyll A, Chlorophyll B, Caratenoids, and others.
Term
The end result of the absorption is the ________ of 2 electrons which is transferred through Chlorophyll A molecules _____ and ______, which accumulate the electrons.
Definition
photoactivation, P680 and P700.
Term
The two chlorophyll A molecules are linked to an _________ ____ _____. This lyses ___ to form ___.
Definition
electron transport chain.
H2O, O2.
Term
The electrons from the lysing enter...
Definition
photosystems 1 and 2.
Term
The electron flow initiates and maintains the _______ _____, which powers ____ synthesis.
Definition
proton gradient. ATP
Term
Fd
Definition
Ferredoxin
Term
PC
Definition
Plastocyanin
Term
Experiment Purpose
Definition
to measure the effect of light (photons) on the production of a proton gradient in isolated chloroplasts.
Term
To measure light-induced proton flow we use
Definition
Lab pH meters.
Term
If photons are taken up by thylakoid membranes when light strikes the chloroplasts..
Definition
the pH of the suspension should increase.
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