Question

In the mitochondrial electron transport chain, electrons are transported from NADH dehydrogenase complex to cytochrome bc1 complex by _______ in _________?

1) ubiquinone, inner mitochondrial membrane
2) cytochrome c, outer mitochondrial membrane
3) cytochrome c, inner mitochondrial membrane
4) ubiquinone, outer mitochondrial membrane

Answer 1

In the electron transport chain, ubiquinone carries electrons from NADH dehydrogenase to cytochrome bc1 complex within the inner mitochondrial membrane.

Step-by-step explanation:

In the mitochondrial electron transport chain, electrons are transported from NADH dehydrogenase complex to cytochrome bc1 complex by ubiquinone in inner mitochondrial membrane. The correct answer to the student's question is 1) ubiquinone, inner mitochondrial membrane. Ubiquinone, also known as coenzyme Q, receives electrons from both complex I (NADH dehydrogenase) and complex II and delivers them to complex III, also known as the cytochrome bc1 complex. It is lipid-soluble and moves through the hydrophobic core of the inner mitochondrial membrane.