Krebs Cycle / Citric Acid Cycle / TCA Cycle: Stage Three: Aerobic Respiration

Aerobic Respiration: Stage Three: The Krebs Cycle

Acetyl-coA enters into the Krebs cycle. This cycle is made up of nine different reactions called the Krebs cycle. This cycle is named after the British biochemist, Sir Hens Krebs. This cycle is also known as the citric acid cycle as in the first step of this cycle, citric acid or citrate is formed. It is also known as the tricarboxylic acid cycle as citrate has three carboxyl groups. During the Krebs cycle, two more ATP molecules are extracted by substrate-level phosphorylation. Also, a large number of electrons is removed and that can be used for the reduction of NAD+ and it is converted into NADH that is useful for the production of ATP by electron transport chain.