Question

please explain the krebs cycle in cellular respiration

Answer 1

The Krebs cycle is important in aerobic metabolism since it takes in reduced carbon and generates energy in the form of ATP and NAD+ is reduced to the NADH. The reduced carbon comes from fat, carbohydrate and protein and so Krebs cycle is important in keeping muscles working when oxygen is present after initial stores of energy are used up.

The Krebs cycle is also known as the citric acid cycle. This is because citric acid is one of the reaction products when oxaloacetate reacts with acetyl coA. This is where the carbon goes into the cycle - eventually the carbon in the acetyl coA is turned into carbon dioxide.

The Krebs cycle is situated in the Inner mitochondrial matrix of the mitochondrion.the reduced NADH carries electrons to the electron transfer chain, which generates ATP for cellular processes - muscle contraction for example.

Answer 2

The Krebs cycle is a series of eight reactions that occur in the mitochondrion. These reactions take a two carbon molecule (acetate) and completely oxidize it to carbon dioxide.