CELL RESPIRATION
THE KREBS CYCLE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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The Krebs Cycle occurs twice for each original glucose molecule. Each turn of the cycle produces how many ATP molecule?
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5
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2
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1
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3
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Explanation:
Detailed explanation-1: -Two molecules of acetyl-CoA are produced from each glucose molecule so two turns of the Krebs cycle are required which yields four CO2, six NADH, two FADH2 and two ATPs.
Detailed explanation-2: -4 ATP (including 2 from glycolysis)
Detailed explanation-3: -It occurs in the mitochondria in the cell. The number of ATP molecules produced in the Krebs cycle is 2.
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.
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