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Question
Out of 38 molecules of ATP produced upon aerobic respiration of glucose, the break up in ATP production in glycolysis(P), pyruvate to acetyl-CoA formation(Q) and Krebs cycle(R) is as follows
Out of 38 molecules of ATP produced upon aerobic respiration of glucose, the break up in ATP production in glycolysis(P), pyruvate to acetyl-CoA formation(Q) and Krebs cycle(R) is as follows
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Solution
The correct option is A P=2, Q=6, R=30
The glucose molecule is broken down to give two molecules of pyruvate. There are 4 ATPs produced but 2 are used up, so the net yield of glycolysis is 2 ATP. The pyruvate molecule is converted to acetyl CoA. One NADH2 molecule is produced when one pyruvate is converted to acetyl-CoA which gives 3 ATP. So, 2 molecules of NADH2 will give 6 ATP. Krebs cycle also produces eight molecules of NADH2 which gives 24 ATP and two molecules of FADH2 which gives 2 ATP per molecule of glucose. There are 2 GTP molecule produced which are converted to form 2 ATP. So, there are 30 ATP.Thus, the correct answer is option A.
The glucose molecule is broken down to give two molecules of pyruvate. There are 4 ATPs produced but 2 are used up, so the net yield of glycolysis is 2 ATP. The pyruvate molecule is converted to acetyl CoA. One NADH2 molecule is produced when one pyruvate is converted to acetyl-CoA which gives 3 ATP. So, 2 molecules of NADH2 will give 6 ATP. Krebs cycle also produces eight molecules of NADH2 which gives 24 ATP and two molecules of FADH2 which gives 2 ATP per molecule of glucose. There are 2 GTP molecule produced which are converted to form 2 ATP. So, there are 30 ATP.
Thus, the correct answer is option A.
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