CELL RESPIRATION
THE KREBS CYCLE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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4
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2
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5
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0
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Detailed explanation-1: -The Krebs cycle is the second phase in cellular respiration. It occurs in the mitochondria in the cell. The number of ATP molecules produced in the Krebs cycle is 2.
Detailed explanation-2: -Thus, one acetyl CoA forms one ATP molecule. Hence, the two will form 2 ATP molecules in one cycle of the Krebs cycle.
Detailed explanation-3: -Because for each glucose molecule there are two pyruvic acid molecules entering the system, two ATP molecules are formed. Also during the Krebs cycle, the two carbon atoms of acetyl-CoA are released, and each forms a carbon dioxide molecule.
Detailed explanation-4: -Oxidation of one molecule of glucose molecule during cellular respiration generates 38 ATP molecules-2 from glycolysis, 2 from Krebs cycle, and 34 from the electron transport system. Therefore, two glucose molecules can generate 76 ATP molecules.
Detailed explanation-5: -The NADH and FADH generated during the Krebs cycle fuels the electron transport chain which drives this process, ultimately producing 38 molecules of ATP.