Question

In the complete oxidation of glucose, six CO2 molecules are formed per glucose molecule. The number of CO2 molecules released by glycolysis is _______, by pyruvate oxidation is _______, and by the citric acid cycle is _______.

Answer 1

Answer:

0, 2, 4

Explanation:

The process of cellular respiration takes place in for phases which oxidizes the glucose molecule to the provide energy molecule called ATP.

Along with ATP, the process releases the metabolic water and carbon dioxide gas. In the oxidation of one glucose molecules, about 6 molecules of CO₂ are released. These CO₂ molecules are produced in the following manner:

1. Glycolysis: CO₂ gas is not produced during this reaction but only ATP and NADH are produced.

2. Pyruvate decarboxylation: the process converts the pyruvate produced by glycolysis to Acetyl-CoA. Formation of 1 Acetyl-CoA produces 1 CO₂ and since 2 Acetyl-CoA is produced therefore produces 2 CO₂ molecules.

3. Citric acid cycle: The cycle converts 2 Acetyl-CoA and produces 4 CO₂ in two cycles converting each Acetyl-CoA.

Thus, 0, 2, 4 is correct.