the electrical component of the proton motive force
T1 - Hacking the thylakoid proton motive force for improved photosynthesis
the osmotic component of the proton motive force
However, it is important to note that this chemical equation is highly simplified; in reality photosynthesis employs a very complex mechanism for the adsorbption and conversion of light into chemical energy, using chemical pathways with many important intermediates.
The electrons transfer from the primary acceptor to plastoquinone, then to plastocyanin, producing proton-motive force as with cyclic electron flow and driving ATP synthase.
threshold level of pmf required for activation of the ATP synthase
This is a series of proteins embedded in a that transfers high-energy electrons from one to another, accomplishing various activities along the way as the electron drops in energy level.
Light absorbed by chlorophyll or other photosynthetic pigments is used to drive a transfer of and hydrogen from water (or some other donor molecule) to an acceptor called +, reducing it to the form of NADPH by adding a pair of electrons and a single proton (hydrogen nucleus).
three ATP molecules are synthesizedD.
In all cells, the energy storage and utilization process involves the Proton-motive force in some step. This can be described as the storing of energy as a combination of a proton and voltage gradient across a . In the Proton-motive force exists across the inner membrane. It is generated by energy from the and is utilized in the synthesis of via ATP Synthase . In plants, the Proton Motive Force also exists in the of the , where it is generated by the of and used to synthesize for use in the fixation of . In , it exists across the cellular membrane of the organism.
Higher plants, phytoplankton, algae, as well as some bacteria carry out the process of photosynthesis.
Steps of Photosynthesis
Photosynthesis occurs in two main stages, the first stage being towards light reaction and the second stage being the Calvin Benson Cycle.
inhibition of both the electron transport chain and ATP synthesis.
no effect on either the electron transport chain or ATP synthesis.
proton motive forceE.
ea.)The production of ATP in photosynthesis.
KW - ATP synthase
what is the proton motive force? | Yahoo Answers
KW - Proton motive force
2009-09-11 · What is the proton motive force ..
Electromagnetic radiation actuallyconsists of two waves-one electrical and one magnetic-that oscillate at 900 toeach other and to the direction of propagation (Fig.
Proton-motive force - Biology-Online Dictionary
In this case, electrons from sulfide or thiosulfate are transferred to a high potential electron carrier in the electron transport chain, and energy is used to move the electrons to a lower reduction potential, so that they can be used to reduced NAPD+.
Proton-motive force in mitochondria vs photosynthesis…
This handout shows how to calculate the free energy available fromA) redox reactions; B) concentration gradients; C) voltage gradients;and D) proton or other ion gradients, which have two components,concentration and voltage. I have taken pains in all sections toemploy sign conventions consistently, so take note of how eachprocess is defined, and how the definition determines the sign of thefree-energy change.
In all cells, chemiosmosis involves the proton-motive force ..
In addition, among autotrophic procaryotes, there are three ways tofix CO2, two of which are unknown among eucaryotes, the CODH(acetyl CoA pathway) and the reverse TCA cycle.
Storage of light-driven transthylakoid proton motive force …
NOTE: In calculations using this equation, and whenever you haveconcentration terms inside a logarithm term, remember that the properterms are really and not concentrations. Theactivity of the solute is its actual concentration divided by itsstandard concentration, so activities are unitless (which is good,because it's very hard to attach a physical meaning to units like). Click tolearn how to compute activies for solutes, gases, hydrogen ions, andwater or other solvents.
Chemiosmosis - CliffsNotes Study Guides | Book …
This electron transport chain produces a proton-motive force (PMF), which leads to the pumping of H+ ions across the membrane and results in a concentration gradient that is used to power ATP synthase during (movement of ions).
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