List of the 21 Countries Bordering the Mediterranean Sea. Marina Grande Harbor in the City of Capri, an Italian island off the Sorrentine Peninsula on the south side of Gulf of Naples in the Mediterranean Sea. VisionsofAmerica/Joe Sohm/Getty Images.
NAD (Nicotinamide adenine dinucleotide). The cellular respiration processes of all living cells make use of the coenzyme Nicotinamide adenine dinucleotide (NAD). It plays a key role in energy metabolism by accepting and donating electrons.The low energy form NAD + shown at left is raised to the high energy form NADH.icotinamide adenine dinucleotide phosphate or NADPH is a reduced coenzyme that plays a key role in the synthesis of carbohydrates in photosynthetic organisms. It is the reduced form of NADP + and as such is a high energy molecule that helps drive the Calvin cycle.
How the NAD+ Works. Why are oxidation and reduction important in cellular respiration? Reduction-oxidation (redox) reactions are important in cellular respiration and other biochemical pathways because redox reactions are a good way to transfer energy from one molecule to another. Reduction is the addition of an electron while oxidation is the removal of an electron. As described in the animation, hydrogen atoms are frequently transferred along with their electrons. Bonds between hydrogen and carbon atoms share electrons equally between the molecules.