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  4. Net gain of ATP molecules, during aerobic respiration, is

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Q. Net gain of ATP molecules, during aerobic respiration, is

NTA AbhyasNTA Abhyas 2020Respiration in Plants

Solution:

In aerobic respiration complete oxidation of one glucose molecule produces 38 ATP molecules. But the
number of ATP molecules so produced may vary depending upon the mode of entry of NADH 2 in the
mitochondria. If the electrons of NADH 2 are accepted by malate then each molecule of NADH 2 yields 3 ATP molecules and the total would be 38 ATP molecules. But if the electrons of NADH 2 are accepted by FAD it yields only 2 ATP molecules making the total of 36 ATP molecules. This type of shuttle occurs in most of the eukaryotic cells.