The video tutorial by Kevin Tolkoff explores the mitochondrial respiratory chain, focusing on complexes 1, 2, and 2.5. It explains the role of NADH and FADH2 in electron transport, highlighting Complex 2 as succinate dehydrogenase in the TCA cycle. The tutorial introduces electron transferring flavoprotein dehydrogenase and its importance in delivering electrons to coenzyme Q. It also covers beta oxidation and the role of intermediate carriers in reducing ubiquinone to ubiquinol, emphasizing the significance of Complex 2.5 in electron delivery.

Discuss the importance of ubiquinone in the electron transport chain.

What is the relationship between succinate dehydrogenase and the Krebs cycle?

What happens to excess FADH2 in the cell according to the discussed mechanisms?