Question

What do all the complexes of the electron transport chain have that allow it to shuttle the electron?

a) flavin mononucleotide (FMN)

b) iron-sulfur clusters

c) cytochromes

d) ubiquinone (coQ)

Answer 1

The complexes of the electron transport chain that allow it to shuttle electrons include flavin mononucleotide (FMN), iron-sulfur clusters, cytochromes, and ubiquinone (coenzyme Q).

Step-by-step explanation:

The complexes of the electron transport chain that allow it to shuttle electrons include:

• Flavin mononucleotide (FMN): This molecule is the first electron acceptor from NADH or FADH₂ in the electron transport chain.
• Iron-sulfur clusters: These clusters, including [2Fe-2S] and [4Fe-4S], receive electrons from FMNH₂.
• Cytochromes: These proteins contain heme groups and help shuttle electrons in the electron transport chain.
• Ubiquinone (coenzyme Q): Also known as Q, this molecule receives electrons from complex I and II and transfers them to complex III.