nad+
NAD and FAD are reduced in the Krebs cycle and oxidised in the electron transport chain.
glycosis, krebs, and electron transformation
Glycosis ( electron transport system ) Krebs cycle.
In the Krebs cycle NAD+ is reduced to NADH. This is one of the electron carriers. Also FAD is reduced to FADH2 which is the other electron carrier produced during the Krebs cycle.
acetyl CoA
NAD+ (nicotinamide adenine dinucleotide) is capable of being reduced during either glycolysis or the Krebs cycle. It accepts electrons and a hydrogen ion to form NADH, which carries these high-energy electrons to the electron transport chain for ATP production.
The Krebs cycle runs twice for each molecule of glucose consumed.
For every molecule of pyruvate entering the Krebs cycle, 3 molecules of CO2 are released. Since each glucose molecule produces 2 molecules of pyruvate through glycolysis, the total number of CO2 molecules released per glucose molecule in the Krebs cycle is 6.
In a complete Krebs Cycle, 24 ATP are produced. Every glucose molecule produces 2 ATP, and there are 12 glucose molecules.
During the Krebs cycle, one molecule of water (H2O) is produced for each round of the cycle. At the end of the cycle, a total of two molecules of water per molecule of glucose are generated.
The starting molecule for the Krebs cycle is acetyl-CoA, which enters the cycle by combining with oxaloacetate to form citrate.
The molecule you are referring to is NAD+ (nicotinamide adenine dinucleotide). It acts as a coenzyme electron carrier in the Krebs cycle by accepting and donating electrons during the oxidation-reduction reactions that occur in the cycle.