What is ubiquinone ?

Ubiquinone, is an electron acceptor in the Electron transport chain. It is found in the inner membrane of mitochondria. It recieves electron from NAD dehydrogenase (complex I) and also from the FADH2 (complex II). The reduced ubiquinone (ubiquinol) is oxidised by transferring of electrons to cytochrome c via cytochrome bc1 complex (complex III).
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How much energy is produced when one molecule of ATP splits into ADP iP molecules?

8.9 K cals.
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What is proton gradient ?


The difference in H+ or proton concentration across the membrane is known as the proton gradient. 
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Where is ETS Located ?

System of electron carriers called electron transport system (ETS) is located on the inner membrane of the mitochondria.
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Why Krebs Cycle is called amphibolic?

Krebs Cycle is called amphibolic, because it is catabolic as well as anabolic.
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