EVERYDAY SCIENCE

Detailed explanation-1: -In eukaryotes, NADH is the most important electron donor. The associated electron transport chain is NADH → Complex I → Q → Complex III → cytochrome c → Complex IV → O2 where Complexes I, III and IV are proton pumps, while Q and cytochrome c are mobile electron carriers.

Detailed explanation-2: -The electron transport chain (ETC) is the major consumer of O2 in mammalian cells. The ETC passes electrons from NADH and FADH2 to protein complexes and mobile electron carriers. Coenzyme Q (CoQ) and cytochrome c (Cyt c) are mobile electron carriers in the ETC, and O2 is the final electron recipient.

Detailed explanation-3: -Its ability to switch between these two forms is what allows NAD to carry out its main function-carrying electrons from one reaction to another in the process of metabolism and energy production. As an electron carrier, NAD+ and NADH help to convert the nutrients in your food into a form of energy your cells can use.

Detailed explanation-4: -NADH is the electron donor in this system. It initiates the electron transport chain by donating electrons to NADH dehydrogenase (blue). NADH donates two electrons to NADH dehydrogenase. At the same time, the complex also pumps two protons from the matrix space of the mitochondria into the intermembrane space.

Detailed explanation-5: -Flavin Adenine Dinucleotide. Flavin adenine dinucleotide, or FAD, consists of riboflavin attached to an adenosine diphosphate molecule. Nicotinamide Adenine Dinucleotide. Coenzyme Q. Cytochrome C.