Question

Which enzymatic action results in CO2 as a product?

O Citrate Synthase

O Succinyl-CoA Synthetase

O Isocitrate Dehydrogenase

O Succinate Dehydrogenase

O Malate Dehydrogenase

Answer 1

Which enzymatic action results in CO2 as a product?

Answer: Isocitrate dehydrogenase.

Explanation:

- During TCA cycle (tricarboxylic acid cycle)/Kreb's cycle, acetyl CoA produced from the metabolism of carbohydrates, fats and proteins is further metabolised through a series of reactions to release energy in the from of ATP (adenosine triphosphate) molecules along with the production of carbon dioxide and water as byproducts.

- During TCA cycle, an enzyme called isocitrate dehydrogenase converts isocitrate to alpha ketoglutarate along with the release of carbon dioxide and NADH + H+.

- Citrate synthase mediates the reaction in which oxaloacetate combines with Acetyl CoA to form citric acid.

- Succinyl CoA synthetase coverts Succinyl CoA to succinate along with the formation of a GTP (guanosine triphosphate) molecule.

- Succinate dehydrogenase converts succinate to fumarate with the formation of FADH2 molecule.

- Malate dehydrogenase converts malate to oxaloacetate along with the formation of NADH + H+.