AP BIOLOGY

Detailed explanation-1: -The electron transport chain is present in multiple copies in the inner mitochondrial membrane of eukaryotes and in the plasma membrane of prokaryotes.

Detailed explanation-2: -The electron transport chain occurs in the cell membrane of prokaryotes, whereas the mitochondrial inner membrane is the site where electron transport occurs in eukaryotes. As electrons are transported in the cell membrane of prokaryotes, a proton concentration gradient is created across the membrane.

Detailed explanation-3: -The electron transport chain is found at the inner mitochondrial membrane. It transfers the electrons from NADH and FADH2 towards oxygen and finally water is produced as a by product. Only in eukaryotic cells, mitochondria are present and only in the inner mitochondrial membrane the electron transport chain is found.

Detailed explanation-4: -The electron transport chain is a set of proteins and other organic molecules found in the inner membrane of mitochondria in eukaryotic cells and the plasma membrane of prokaryotic cells.

Detailed explanation-5: -Mitochondria, for example, are organelles that provide eukaryotes with most of their energy by producing energy-rich molecules called ATP. Prokaryotes lack mitochondria and instead produce their ATP on their cell surface membrane.