CELL RESPIRATION
THE KREBS CYCLE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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one molecule of water
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three molecules of oxygen
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three molecules of carbon dioxide
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one molecule of glucose
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Detailed explanation-1: -Also during the Krebs cycle, the two carbon atoms of acetyl-CoA are released, and each forms a carbon dioxide molecule. Thus, for each acetyl-CoA entering the cycle, two carbon dioxide molecules are formed.
Detailed explanation-2: -Thus, 1 glucose molecule is responsible for the release of 4 CO2 molecules during Krebs cycle.
Detailed explanation-3: -The three-carbon pyruvic acid molecules are converted to a two-carbon molecule attached to Coenzyme A, called acetyl CoA, via the process of pyruvate oxidation. It is the product, acetyl CoA, which enters the Krebs cycle.
Detailed explanation-4: -For one glucose molecules, there will be two rounds of Krebs cycle. This is because two molecules of Pyruvic acid are formed from one molecule of glucose during Glycolysis.