These six CO2 molecules are given off as waste gas in the Krebs cycle. They represent the six carbons of glucose that originally entered the process of glycolysis. At the end of the Krebs cycle, the final product is oxaloacetic acid. This is identical to the oxaloacetic acid that begins the cycle.

What are the starting products of the Krebs cycle?

Citric acid is also the first product formed in the Krebs cycle, and therefore this acid occurs in the metabolism of virtually all living things. The energy stored in pyruvate is transferred to NADH and FADH2, and some ATP is produced.

What are the raw and end products of the Krebs cycle?

Products and Functions of the Krebs Cycle For one cycle, two molecules of carbon, three molecules of NADH, one molecule of FADH2 and one molecule of ATP or GTP are produced. … The main function of the Krebs cycle is to produce energy, stored and transported as ATP or GTP.

What does Krebs cycle start and end?

Steps of the Krebs Cycle The Krebs cycle itself actually begins when acetyl-CoA combines with a four-carbon molecule called OAA (oxaloacetate) (see Figure above). This produces citric acid, which has six carbonatoms. … The final step of the Krebs cycle regenerates OAA, the molecule that began the Krebs cycle.

What are the reactants and products of the Krebs cycle?

Krebs Cycle Reactants The only reactants of the Krebs cycle proper are acetyl CoA and the aforementioned four-carbon molecule, oxaloacetate. The availability of acetyl CoA hinges on adequate amounts of oxygen being present to suit the needs of a given cell.