Name: Respiratory Balance Sheet
Uploaded: 2019-07-19
Duration: 11 min 51 s
Description: The respiratory balance sheet is the sheet portraying the net gain of ATP for each molecule of glucose. Learn more about the respiratory balance sheet in this video!

Question

Write explanatory notes on electron transport chain.

Accepted Answer

Terminal oxidation consists of two processes- electron transport and oxidative phosphorylation.

Inner mitochondrial membrane contains groups of electron and proton transporting enzymes.

In each called electron group the enzymes are arranged in a specific series transport chain (ETC) mitochondrial respiratory chain or electron transport system (ETS).

An electron transport chain or system is a series of coenzymes and cytochrome that take part in the passage of electrons from a chemical to its ultimate acceptor. The passage of electrons from one enzyme or cytochrome to the next is a downhill journey with a loss of energy at each step.

At each step the electron carriers include flavins, iron sulphur complexes, quinones and cytochromes. Most of them are prosthetic groups of proteins. Quinones are highly mobile electron carriers. Inner mitochondrial membrane possesses five complexes. Complex V is connected with ATP synthesis (Fo-F1 particle).

Complexes I to IV are involved in electron transport-
(i) NADH - UQ reductase or NADH - dehydrogenase complex,
(ii) Succinate UQ reductase complex,
(iii) UQH - cytochrome c reductase complex,
(iv) Cytochrome c oxidase complex

Write explanatory notes on electron transport chain.

Important Questions on Respiration in Plants

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