Complex I in the ETC passes electrons to Group of answer choicesComplex IIComplex IIIUbiquinoneeither Complex II or UbiquinoneComplex IV
Question
Complex I in the ETC passes electrons to Group of answer choicesComplex IIComplex IIIUbiquinoneeither Complex II or UbiquinoneComplex IV
Solution
To answer the question about Complex I in the Electron Transport Chain (ETC) and its role in passing electrons, let's break it down step by step:
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Understanding Complex I: Complex I, also known as NADH:ubiquinone oxidoreductase, is the first enzyme of the mitochondrial electron transport chain.
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Role of Complex I: It receives electrons from NADH, which are then transferred through a series of iron-sulfur (Fe-S) clusters within Complex I.
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Electron Transfer: The electrons are ultimately passed to ubiquinone (also known as coenzyme Q10), reducing it to ubiquinol.
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Next Step in the ETC: Ubiquinol then carries the electrons to Complex III.
Given this information, the correct answer is:
Ubiquinone
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