What is the Krebs cycle?
-biochemical pathway that breaks down Acetyl Co A producing Co2, ATP and hydrogen atoms
-takes place in the matrix of the mitochondria in a eukaryotic cell
-the Krebs Cycle consists of five main steps
Steps of the Krebs cycle:
1.2 carbon molecules of Acetyl CoA combine with a four-carbon compound, oxaloacetic acid, to produce a six carbon compound, citric acid
2. The Citric acid releases a Co2 molecule and a hydrogen atom to form a five-carbon compound. By losing a hydrogen atom within its electron, citric acid is oxidized. The electron in the hydrogen atom is transferred to NAD+, reducing it to NADH.
3. The five-carbon compound formed in the second step, releases a Co2 molecule and a hydrogen atom, forming a four-carbon compound. Once again, NAD+ is reduced to NADH.
4.The four-carbon compound formed in the third step releases a hydrogen atom to form another four-carbon compound. This time, the hydrogen atom is used to reduce FAD to FADH2.
5.The four-carbon compound formed in the fourth step releases a hydrogen atom to regenerate oxaloacetic acid, which keeps the Krebs Cycle operating. The electron in the hydrogen atom reduces NAD+ to NADH.
-biochemical pathway that breaks down Acetyl Co A producing Co2, ATP and hydrogen atoms
-takes place in the matrix of the mitochondria in a eukaryotic cell
-the Krebs Cycle consists of five main steps
Steps of the Krebs cycle:
1.2 carbon molecules of Acetyl CoA combine with a four-carbon compound, oxaloacetic acid, to produce a six carbon compound, citric acid
2. The Citric acid releases a Co2 molecule and a hydrogen atom to form a five-carbon compound. By losing a hydrogen atom within its electron, citric acid is oxidized. The electron in the hydrogen atom is transferred to NAD+, reducing it to NADH.
3. The five-carbon compound formed in the second step, releases a Co2 molecule and a hydrogen atom, forming a four-carbon compound. Once again, NAD+ is reduced to NADH.
4.The four-carbon compound formed in the third step releases a hydrogen atom to form another four-carbon compound. This time, the hydrogen atom is used to reduce FAD to FADH2.
5.The four-carbon compound formed in the fourth step releases a hydrogen atom to regenerate oxaloacetic acid, which keeps the Krebs Cycle operating. The electron in the hydrogen atom reduces NAD+ to NADH.
Video got from YouTube: https://www.youtube.com/watch?v=O6bInBQXtmM