a)Is oxygen the final electron acceptor or the proton acceptor?[ in the reader it is the H acceptor]
if not... what happens to the electrons? where does it go?
b)How is ATP synthesised?
Dear student,
Refer below for above asked query:-
(a). The final electron acceptor of electron transport chain is molecular oxygen.
Cytochrome c transfers the electrons between Complex III and Complex IV (Cytochrome c − oxidase complex consists of cyt a and a 3 , along with two copper centres). A transition of Cu+ to Cu2 + takes place during the transfer of electrons through the complex to molecular oxygen. After which water is formed by the reduction of oxygen.
(b). Oxidative phosphorylation is the mechanism of ATP synthesis in mitochondrion during respiration. In this process, proton gradient across the membrane is used to synthesise ATP from ATP synthase.
The energy of oxidation-reduction is utilised for the production of proton gradient needed for the synthesis of ATP this is why this process is called oxidative phosphorylation.
When the electrons are transferred from one carrier to the other in the electron transport chain, protons get pumped into the inter-membrane space of the mitochondria creating a proton gradient across the membrane. When these protons pass through the ATP synthase enzyme complex, ATP gets synthesised. This enzyme complex consists of F 0 and F 1 components. The F 1 headpiece is a peripheral membrane protein complex and contains the site for ATP synthesis from ADP and inorganic phosphate. F 0 component is a part of membrane protein complex, which acts as a channel for crossing of the protons from inner mitochondrial membrane to the mitochondrial matrix. For every two protons passing through F 0 –F 1 complex, synthesis of one ATP molecule takes place.
Hope this information will clear your doubts about topic.
If you have any more doubts just ask here on the forum and our experts will try to help you out as soon as possible.
Regards
Refer below for above asked query:-
(a). The final electron acceptor of electron transport chain is molecular oxygen.
Cytochrome c transfers the electrons between Complex III and Complex IV (Cytochrome c − oxidase complex consists of cyt a and a 3 , along with two copper centres). A transition of Cu+ to Cu2 + takes place during the transfer of electrons through the complex to molecular oxygen. After which water is formed by the reduction of oxygen.
(b). Oxidative phosphorylation is the mechanism of ATP synthesis in mitochondrion during respiration. In this process, proton gradient across the membrane is used to synthesise ATP from ATP synthase.
The energy of oxidation-reduction is utilised for the production of proton gradient needed for the synthesis of ATP this is why this process is called oxidative phosphorylation.
When the electrons are transferred from one carrier to the other in the electron transport chain, protons get pumped into the inter-membrane space of the mitochondria creating a proton gradient across the membrane. When these protons pass through the ATP synthase enzyme complex, ATP gets synthesised. This enzyme complex consists of F 0 and F 1 components. The F 1 headpiece is a peripheral membrane protein complex and contains the site for ATP synthesis from ADP and inorganic phosphate. F 0 component is a part of membrane protein complex, which acts as a channel for crossing of the protons from inner mitochondrial membrane to the mitochondrial matrix. For every two protons passing through F 0 –F 1 complex, synthesis of one ATP molecule takes place.
Hope this information will clear your doubts about topic.
If you have any more doubts just ask here on the forum and our experts will try to help you out as soon as possible.
Regards