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Answer :
Sure! Let's go through the electron transport chain reaction step-by-step.
In the context of the electron transport chain, particularly in mitochondria, FADH₂ and coenzyme Q (which is also known as ubiquinone) play crucial roles:
1. Starting Materials:
- FADH₂: This molecule is reduced flavin adenine dinucleotide. It acts as an electron donor.
- Q (Coenzyme Q or Ubiquinone): This is a molecule that accepts electrons. It is in its oxidized form initially.
2. The Reaction:
- During the electron transport chain, FADH₂ participates by donating electrons to coenzyme Q.
- As FADH₂ donates its electrons, it becomes oxidized to FAD (losing the two electrons and two protons, which are hydrogen ions).
- Coenzyme Q (Q) initially in its oxidized form, gains the two electrons and two protons donated by FADH₂, becoming reduced to QH₂.
3. Reaction Product:
- The reduced form of Coenzyme Q is commonly abbreviated as QH₂ (ubiquinol).
- Therefore, the complete and balanced equation for this reaction considering these processes should be:
[tex]\[
\text{FADH}_2 + \text{Q} \longrightarrow \text{FAD} + \text{QH}_2
\][/tex]
In this reaction, FADH₂ is oxidized to FAD, and Coenzyme Q (Q) is reduced to QH₂. This balanced reaction ensures that the transfer of electrons and protons reflects what happens in the electron transport chain.
In the context of the electron transport chain, particularly in mitochondria, FADH₂ and coenzyme Q (which is also known as ubiquinone) play crucial roles:
1. Starting Materials:
- FADH₂: This molecule is reduced flavin adenine dinucleotide. It acts as an electron donor.
- Q (Coenzyme Q or Ubiquinone): This is a molecule that accepts electrons. It is in its oxidized form initially.
2. The Reaction:
- During the electron transport chain, FADH₂ participates by donating electrons to coenzyme Q.
- As FADH₂ donates its electrons, it becomes oxidized to FAD (losing the two electrons and two protons, which are hydrogen ions).
- Coenzyme Q (Q) initially in its oxidized form, gains the two electrons and two protons donated by FADH₂, becoming reduced to QH₂.
3. Reaction Product:
- The reduced form of Coenzyme Q is commonly abbreviated as QH₂ (ubiquinol).
- Therefore, the complete and balanced equation for this reaction considering these processes should be:
[tex]\[
\text{FADH}_2 + \text{Q} \longrightarrow \text{FAD} + \text{QH}_2
\][/tex]
In this reaction, FADH₂ is oxidized to FAD, and Coenzyme Q (Q) is reduced to QH₂. This balanced reaction ensures that the transfer of electrons and protons reflects what happens in the electron transport chain.
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