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The components of the electron transport chain are composed of multiple electron

ID: 163665 • Letter: T

Question

The components of the electron transport chain are composed of multiple electron carriers, with prosthetic groups that are capable of being reversibly oxidized and reduced. Name the five kinds of carriers. Which is the only non protein electron carrier? We know that there is an order to the complexes that compose the electron transport chain, and thus the electron carriers. What determines the position of each electron carrier? Although not the same thing, it may be helpful to think of this like electro negativity, and the electrons move towards the more electronegative molecule. in the case of aerobic cellular respiration, what is the final electron acceptor? the electron transport chain is composed of four respiratory complexes. What is the name of each of these complexes. Which complexes are involved in the oxidation of NADH? Which complexes are involved in the oxidation of FADH_2? Follow the electrons from NADH to the final electron acceptor.

Explanation / Answer

16) The electron carriers are molecules that allow the flow of electrons through membranes. The 5 kinds of electron carriers are:- Pyridine-linked dehydrogenases,Flavin-linked de­hydrogenases,Coenzyme Q or ubiquinone, cytochrome and Iron-sulfur proteins.

The Quinones are lipids,they are the non-protein electron carriers.

17) The position of electron carriers is based onn their redox potentials. Electrons are transferred from less electronegative to more electronegative carrier. The final electron acceptor is oxygen.

18)Complex I ( NADH dehydrogenase ), Complex II (succinate dehydrogenase ), Complex III (cytochrome bc1 complex ) and Complex IV (cytochrome c oxidase ) are the four complexes. Complex I is involved in oxidation of NADH and Complex II is involved in oxidation of FADH2.

19) NADH Complex I Quinone Complex III cytochrome c Oxidase Complex IV OXYGEN

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