Cellular Respiration Process Chemiosmosis. In cellular respiration the electrons for the electron transport chain come from nadh which gets electrons from food molecules and ultimately go to oxygen or another terminal electron acceptor to form. All eukaryotic organisms have mitochondria so chemiosmosis is involved in atp production through cellular respiration in the vast majority of different types of organisms from animals to plants to fungi to protists.
Let us understand the structure of mitochondria before diving into the process of chemiosmosis. In chemiosmosis the free energy from the series of redox reactions just described is used to pump hydrogen ions protons across the membrane. All eukaryotic organisms have mitochondria so chemiosmosis is involved in atp production through cellular respiration in the vast majority of different types of organisms from animals to plants to fungi to protists.
Components of the electron transport chain couple electron transfers oxidation reduction reactions to active transport of protons across the membrane a process called chemiosmosis.
Chemiosmotic hypothesis was proposed by peter mitchell 1961. Chemiosmotic theory states that electron transport and atp synthesis are coupled by a proton gradient across the inner mitochondrial membrane. Chemiosmosis in mitochondria the energy released as electrons pass down the gradient from nadh to oxygen is harnessed by three enzyme complexes of the respiratory chain i iii and iv to pump protons h against their concentration gradient from the matrix of the mitochondrion into the intermembrane space an example of active transport. Let us understand the structure of mitochondria before diving into the process of chemiosmosis.