CELL RESPIRATION
THE KREBS CYCLE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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2
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1
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4
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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: -The net energy output for one glucose molecule from glycolysis through the Krebs cycle is: 4 ATP, 10 NADH + H+, and 2 FADH2.
Detailed explanation-3: -Therefore, two glucose molecules can generate 76 ATP molecules.
Detailed explanation-4: -In the eighth or last step, malate is dehydrogenated so as to form Oxaloacetate. This combines with another molecule of acetyl CoA resulting at the beginning of a new cycle. 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-5: -2 ATPs are produced in the TCA cycle per glucose molecule (2 acetyl CoA).