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Which of the following catabolic pathways directly produce both ATP (or GTP) and NADH?Fatty acid oxidationGlycolysisThe Krebs cycleThe electron transport chainA.I and II onlyB.II and III onlyC.I, II, and III onlyD.II, III, and IV only

Question

Which of the following catabolic pathways directly produce both ATP (or GTP) and NADH?Fatty acid oxidationGlycolysisThe Krebs cycleThe electron transport chainA.I and II onlyB.II and III onlyC.I, II, and III onlyD.II, III, and IV only

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Solution

The catabolic pathways that directly produce both ATP (or GTP) and NADH are:

  1. Fatty acid oxidation: This process breaks down fatty acids to produce Acetyl-CoA, which enters the Krebs cycle. It also produces NADH and FADH2, which are used in the electron transport chain to produce ATP.

  2. Glycolysis: This is the metabolic pathway that converts glucose into pyruvate. During this process, NAD+ is reduced to NADH and a net gain of 2 ATP is produced.

  3. The Krebs cycle (also known as the citric acid cycle or TCA cycle): This is a series of chemical reactions used by all aerobic organisms to release stored energy through the oxidation of acetyl-CoA derived from carbohydrates, fats, and proteins into ATP and carbon dioxide. In the process, it also produces NADH.

The electron transport chain, on the other hand, uses the NADH and FADH2 produced by the other three pathways to produce ATP. It does not directly produce NADH.

So, the correct answer is C. I, II, and III only.

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Similar Questions

Which of the following metabolic processes produces the most ATP?

Select all correct characterizations of glycolysis.Multiple select question.It directly yields two ATP molecules per glucose.It produces NADH.It produces two pyruvate molecules per glucose.It releases carbon dioxide from glucose.It requires oxygen.

7. Glycolysisa. takes place in the mitochondrion.b. produces no ATP.c. has no connection with the electron transport chain.d. is the same thing as fermentation.e. reduces two molecules of NAD+ for every glucose molecule processed.

Heart and liver cells can produce more ATP for each molecule of glucose than other cells in the body. This is most likely results of: A) a more efficient ATP synthase on the outer mitochondrial membrane. B) an additional turn of the Kreb's cycle for each glucose molecule. C) a more efficient mechanism for moving NADH produced in glycolysis into the mitochondrial matrix. D) production of additional NADH by the citric acid cycle. E) specialized enzymes for glucose metabolism unique to heart and liver cells.

Which of these biochemical processes would you expect to liberate the most ATP?a) Gluconeogenesisb) Fatty acid synthesisc) Glycolysisd) Beta oxidatione) Electron transport chain activity

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