LABORATORY REVIEW
CELL RESPIRATION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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3
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4
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2
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1
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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: -In the Krebs cycle, two ATP, six NADH +H+, and two FADH2 were produced.
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: -Another stage, the Krebs cycle makes a net 2 ATP molecules. The most productive stage, the electron transport chain makes 32 or 34 ATP molecules.