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what is phosphorylation?

Updated: 10/25/2022
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Mohammad Jaminul Akr...

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3y ago

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Oxidative PhosphorylationOxidative phosphorylation is a process by which most ATPs (~34-36) are produced in cellular respiration. Within the inner mitochondiral membrane, there is what is called and Electron Transport Chain/System (ETC/ETS). The ETC involves various enzymes, "complexes", and cytochromes, which act as electron acceptors. Electrons are carried by two main molecules (NADH and FADH2) to the ETC from glycolysis and the Krebs Cycle. Once at the ETC, they give up their electrons as well as hydrogen ions (H+ or protons). The electrons then pass through each enzyme in redox reactions: first becoming reduced, then oxidized. The electrons give off a small amount of energy each time they are transferred as free energy drops. This energy is taken by the proteins in the ETC to pump the protons into the intermembrane space. Eventually the electrons make their way to the bottom of the chain where they meet oxygen (usually).

The proton gradient caused by the high concentration of protons in the intermembrane space begins another process called chemiosmosis. The protons "want" to diffuse back into the mitochondrial matrix and to a lower concentration. A very special enzyme in the membrane called ATP synthase will take protons and transport them into the matrix. In doing so, energy is released and used to phosphorylate ADP into ATP.

This process of producing ATP differs from substrate-level phosphorylation. See related links and questions below for more information.

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Michael Bogisich

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3y ago
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10y ago

It is the process which is an integral part of photosynthesis during which ADP gets converted into ATP with the aid of energy from electrons released during photolysis of water in photosynthesis.

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Q: What is phosphorylation?
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Related questions

What is the attachment of a phosphate group to a molecule called?

phosphorylation


What type of phosphorylation does not require a membrane?

oxidative phosphorylation


In fermentation is ATP produced by substrate level phosphorylation or oxidative phosphorylation or both or neither?

ATP is produced by substrate level phosphorylation during glycolisis. There is no oxidative phosphorylation in fermentation since it's an anaeorobic respiration.


Photophosphorylation is most similar to?

oxidative phosphorylation in cellular respiration


What is the advantage of the phosphorylation cascade?

An advantage of the phosphorylation cascade is that is can be helpful to regulate the activation of proteins.


Another name for electron transport chain is?

oxidative phosphorylation


Substrate-level phosphorylation can best be describe as?

Substrate-level phosphorylation can best be describe as the direct transfer of phosphate from one substrate to another. Oxidative phosphorylation is different from substrate level phosphorylation is that it generates ATP by using a proton motive force.


What is the opposite of oxidative phosphorylation?

The opposite of phosphorylation is dephosphorylation. Source: http://en.wikipedia.org/wiki/Dephosphorylation


The transfer of a phosphate group that occurs in glycolysis is called?

That transfer is called phosphorylation.


ATP can convert to ADP during what?

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 removal of a phosphate group from a protein to cause the protein to change its confirmation is called phosphorylation?

No, phosphorylation is the addition of a phosphate group.


What does phosphorylation do to a moleclue?

it adds a phosphate group Phosphorylation is the addition of a phosphate (PO43−) group to a protein or other organic molecule.