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How many molecules of last electron acceptor in ETS are required if one molecule of isocitrte is a substrate during aerobic respiration?
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Calculation of molecules of last electron acceptor in ETS
- Number of ATP molecules produced from one molecule of isocitrate in aerobic respiration:
- Isocitrate undergoes several steps in the Krebs cycle to produce ATP through oxidative phosphorylation.
- Each molecule of isocitrate produces 3 molecules of NADH, 1 molecule of FADH2, and 1 molecule of GTP.
- These electron carriers (NADH and FADH2) donate electrons to the electron transport chain (ETC) for ATP synthesis.
- Role of electron transport chain (ETC) in ATP synthesis:
- The ETC is a series of protein complexes located in the inner mitochondrial membrane.
- Electrons from NADH and FADH2 are passed through the ETC, leading to the pumping of protons across the membrane.
- The final electron acceptor in the ETC is oxygen, which combines with protons to form water.
- Number of molecules of last electron acceptor (oxygen) required:
- For each molecule of NADH passing through the ETC, 3 molecules of ATP are produced.
- For FADH2, 2 molecules of ATP are produced.
- Therefore, for one molecule of isocitrate (producing 3 NADH and 1 FADH2), a total of 10 molecules of ATP are produced.
- Since 1 molecule of oxygen is required to accept electrons in the ETC, the number of oxygen molecules needed is 1.
In conclusion, when one molecule of isocitrate is used as a substrate during aerobic respiration, the number of molecules of the last electron acceptor (oxygen) required in the ETC is 1.
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How many molecules of last electron acceptor in ETS are required if one molecule of isocitrte is a substrate during aerobic respiration?
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How many molecules of last electron acceptor in ETS are required if one molecule of isocitrte is a substrate during aerobic respiration? for UPSC 2025 is part of UPSC preparation. The Question and answers have been prepared according to the UPSC exam syllabus. Information about How many molecules of last electron acceptor in ETS are required if one molecule of isocitrte is a substrate during aerobic respiration? covers all topics & solutions for UPSC 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for How many molecules of last electron acceptor in ETS are required if one molecule of isocitrte is a substrate during aerobic respiration?.
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