Final answer:
The true statement about the components of the electron transport chain is that Complex II is a transmembrane protein. This protein does not pump protons, unlike Complexes I, III, and IV, which are also transmembrane proteins.
Step-by-step explanation:
Selecting the true statement about the components of the electron transport chain: Complex III is not a peripheral membrane protein; it is a transmembrane protein that extends from the matrix to the intermembrane space. Cytochrome c is indeed associated with the electron transport chain, however, it is not a lipid-linked protein but rather a soluble protein that moves along the surface of the inner membrane. Complex II is indeed a transmembrane protein, but it differs because it does not pump protons. Complex I is an integral membrane protein. Contrary to the false statement given, Complex IV is a transmembrane protein and plays a critical role in the electron transport chain by receiving electrons from cytochrome c.