Question

Which step in the TCA cycle is related to the oxidative decarboxylation step?

Answer 1

We need to know that the TCA cycle is also known as tricarboxylic acid cycle or citric acid cycle. This cycle is a main part of aerobic respiration and the TCA cycle is the important source of energy for the cells. The primary function of the TCA cycle is the generation of energy by oxidation of acetyl – CoA to the carbon dioxide molecules. At the end of the TCA cycle, there is a formation of ATP with some byproducts which is three NADH and one $FAD{H_2}$.

Complete answer:
We have to know that the third step in the TCA cycle is related to the oxidative decarboxylation step. In the citric acid cycle, the first oxidative decarboxylation process takes place in the third step. And in that oxidative decarboxylation process, there is a formation of NADH, alpha – ketoglutarate and a five carbon compound. Here, the oxidative produces NADH or $FAD{H_2}$ and by the decarboxylation process it produces carbon dioxide.
The citric acid cycle takes place in the mitochondria. The oxidative decarboxylation of alpha KGDH occurs in the fourth step and there is a formation of alpha-ketoglutarate.

Note:
We have to know that the citric acid cycle is generated from citric acid. The citric acid is also known as tricarboxylic acid due to the presence of three carboxylic groups. And this cycle contains mainly three steps. The TCA cycle will regulate the concentration of ATP and NADH. The isocitrate dehydrogenase and alpha – ketoglutarate are the enzymes which control the citric acid cycle. The citric acid is considered the first stable product in the TCA cycle.