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
During cellular respiration, one molecule of pyruvate is converted into one molecule of acetyl-CoA before entering the Krebs cycle. This conversion reduces one molecule of NAD to NADH. In the Krebs cycle, each acetyl-CoA generates three NADH and one FADH2. Therefore, from one pyruvate, a total of four NADH and one FADH2 are produced.
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, also known as the citric acid cycle, must run once for each molecule of pyruvate. Since one glucose molecule produces two pyruvate molecules during glycolysis, the Krebs cycle runs twice for each glucose molecule. Therefore, for one molecule of pyruvate, the cycle runs just once.
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.
The Krebs cycle runs twice for each molecule of glucose consumed.
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.