The constituents of the electron transport chain have similar capabilities, with the exception of ubiquinone coenzyme Q). What is different about ubiquinone?
A) Ubiquinone is a protein that begins the electron transport chain. It therefore accepts high- energy electrons.
B) Ubiquinone is a protein that is a constituent of all cells, prokaryotic or eukaryotic; hence its name.
C) Ubiquinone is a protein that serves as a regulator of the speed of redox reactions in the electron transport chain.
D) Ubiquinone is lipid soluble and can therefore move through the inner mitochondrial membrane.

Question

Quizplus · Accepted Answer

Ubiquinone is different from the other constituents of the electron transport chain because it is lipid soluble and can therefore move freely through the inner mitochondrial membrane. This allows it to transfer electrons between the different complexes in the chain.

The Constituents of the Electron Transport Chain Have Similar Capabilities