The chemiosmosis theory postulates that living cells produce ATP from a proton gradient across a membrane by an enzyme called ATP synthase. Animals generate this proton gradient with the mitochondrial electron transport chain. When reductants (NADH, FADH2) give up their electrons to the electron transport chain, the electrons move to increasingly stronger oxidizing agents, using the released energy to pump protons across the mitochondrial inner membrane. Plants, however, generate the proton gradient directly with the photosystems and the photosynthetic electron transport chain. When the photosystem becomes excited, water is split into protons, oxygen and electrons. The electrons are then passed into the photosynthetic electron transport chain, which is analogous to the mitochondrial electron transport chain in that it also uses the energy of the oxidation reactions to pump protons across the thylakoid membrane. The end result is the same, however, because the proton gradient generates proton motive force, which is then used to synthesize ATP with ATP synthase.
Either way, someones getting phosphorylated.
the similarities are removing a phosphate group.
Phosphorylation. It can be done by direct transfer of phosphate group (substrate-level phosphorylation), by the use of proton gradient (oxidative phosphorylation), or by using sunlight (photophosphorylation).
The answer is A) Cyclic Photophosphorylation
Yes, photophosphorylation requires CO2.
To avoid photophosphorylation to take place( that's to avoid competition between oxygen and corbondioxide in the activesite of rubisco)
no
oxidative phosphorylation in cellular respiration
Oxidative phosphorylation is ATP synthesis driven by electron transfer to oxygen and photophosphorylation is ATP synthesis driven by light. Oxidative phosphorylation is the culmination of energy-yielding metabolism in aerobic organisms and photophosphorylation is the means by which photosynthetic organisms capture the energy of sunlight, the ultimate source of energy in the biosphere.
in oxidative phosphorylation, the H+ moved out of the cell using the channel proteins that make up the ETC (electron transport chain) and then they flow back into the mitochondria through the ATP synthase because of the concentration gradient. Photophosphorylation has its H+ ions travelling in the opposite direction (from inside to outside of the chloroplasts through ATP synthase. Another difference is the fact that in photophosphorylation the H+ are produced by splitting water while the H+ in oxidative phosporylation come from H+ that have been removed from compounds and have had their electrons removed by NAD+ or FAD.
Phosphorylation. It can be done by direct transfer of phosphate group (substrate-level phosphorylation), by the use of proton gradient (oxidative phosphorylation), or by using sunlight (photophosphorylation).
The answer is A) Cyclic Photophosphorylation
Yes, photophosphorylation requires CO2.
To avoid photophosphorylation to take place( that's to avoid competition between oxygen and corbondioxide in the activesite of rubisco)
In glycolysis, ATP molecules are produced by? a- oxidative phosphorylation b-substrate-level phosphorylation c-cellular respiration d-photophosphorylation e-photosynthesis
no
photophosphorylation
Photophosphorylation refers to the use of light energy from photosynthesis. Ti provides the energy to convert ADP to ATP.
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