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importance of NAD for the production of ATP in glycolysis and Krebs cycle?

Can someone please explain to me the importance of NAD for the production of ATP in glycolysis and Krebs cycle?
During respiration, some molecules of NAD are reduced to NADH [also called reduced NAD]; when these are returned to their resting state of NAD by oxidation, each molecule of NAD provides 2 molecules of ATP - similarly each FAD releases 3 ATP. These "ATPs" contribute to the total number of ATPs generated from ADP during each cycle of respiration.

FOR A* OR for synoptic Q [outside syllabus]: nicotinamide [a B group vitamin] is a precursor of NAD [nicotinamide adenine dinucleotide], so you will find that it is present in some multivitamin and B Complex vitamin supplements with a claim to boost energy levels [at least theoretically justified] - similarly these products contain Vitamin B1 [riboflavine], a precursor of FAD [flavine adenine dinucleotide].

M [specialist biology tutor]
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TheKitty.x
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Original post by macpatgh-Sheldon
During respiration, some molecules of NAD are reduced to NADH [also called reduced NAD]; when these are returned to their resting state of NAD by oxidation, each molecule of NAD provides 2 molecules of ATP - similarly each FAD releases 3 ATP. These "ATPs" contribute to the total number of ATPs generated from ADP during each cycle of respiration.

FOR A* OR for synoptic Q [outside syllabus]: nicotinamide [a B group vitamin] is a precursor of NAD [nicotinamide adenine dinucleotide], so you will find that it is present in some multivitamin and B Complex vitamin supplements with a claim to boost energy levels [at least theoretically justified] - similarly these products contain Vitamin B1 [riboflavine], a precursor of FAD [flavine adenine dinucleotide].

M [specialist biology tutor]

Thank you xx

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