How many CO_2 molecules are produced in the K | vedclass

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(A) The Krebs cycle (also known as the Citric Acid Cycle) occurs in the mitochondrial matrix.When one molecule of pyruvic acid $(3C)$ enters the mitoc

Vedclass · Accepted Answer

$3$

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(A) The Krebs cycle (also known as the Citric Acid Cycle) occurs in the mitochondrial matrix.When one molecule of pyruvic acid $(3C)$ enters the mitochondria, it first undergoes oxidative decarboxylation to form one molecule of Acetyl-CoA $(2C)$, releasing one $CO_2$ molecule.Inside the Krebs cycle, the Acetyl-CoA $(2C)$ combines with oxaloacetic acid $(4C)$ to form citric acid $(6C)$.During the subsequent steps of the cycle, two molecules of $CO_2$ are released as the cycle progresses back to oxaloacetic acid.Therefore, for one molecule of pyruvic acid, the total number of $CO_2$ molecules released during the complete oxidation (including the link reaction) is $1 (link) + 2 (Krebs) = 3$ molecules of $CO_2$.

How many $CO_2$ molecules are produced in the Krebs cycle when one molecule of pyruvic acid enters and is oxidized completely?

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