FAD is used in which of the following stages of cellular respiration?Group of answer choicesKrebs CycleElectron Transport ChainGlycolysisIntermediate StepAll of these
Question
FAD is used in which of the following stages of cellular respiration?Group of answer choicesKrebs CycleElectron Transport ChainGlycolysisIntermediate StepAll of these
Solution
FAD (Flavin Adenine Dinucleotide) is used in two main stages of cellular respiration:
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Krebs Cycle (also known as the Citric Acid Cycle): In this cycle, FAD is reduced to FADH2 as it accepts two hydrogen atoms (protons and electrons). This happens during the conversion of succinate to fumarate.
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Electron Transport Chain: FADH2, which was produced in the Krebs Cycle, is oxidized back to FAD. The electrons removed from FADH2 are transferred through the electron transport chain, and their energy is used to pump protons across the inner mitochondrial membrane, contributing to the creation of a proton gradient that drives ATP synthesis.
Therefore, the correct answer is: Krebs Cycle and Electron Transport Chain.
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