Question

Select the best answer. The source(s) of electrons (i.e. the reduced cofactors) for the Electron Transport...

Select the best answer. The source(s) of electrons (i.e. the reduced cofactors) for the Electron Transport Chain include(s):

1. Glycolysis

2. Gluconeogenesis

3. Pyruvate Dehydrogenase Complex Reaction

4. Citric Acid Cycle

5. Fatty Acid β-Oxidation

  • A. 1, 3, 4
  • B. 2, 3, 4
  • C. 1, 3, 4, 5
  • D. 2, 3, 4, 5
  • E. 1, 2, 3, 4, 5
  • F. 1, 5
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Answer #1

Electron Transport chain requires electron from various metabolic processes in order to produce ATP from NADH and FADH2 that are produced and released during these metabolic processes. The processes that supply the ETC with electrons are : Glycolysis, fatty acid oxidation, TCA or citric acid cycle mostly. Gluconeogenesis, by the shuttle mehanisms in mitochondria produces electrons that is carried by NADH+ to the oxidative phosphorylation process for ATP production and so is the PDH complex reaction that produces 2 electrons. Hence,

The correct answer to this question is : Option E = 1,2,3,4,5

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