Mitochondrial Electron Transport Chain Quiz

What is the primary role of enzyme complex 1 in the electron transport chain?

• To synthesize ATP directly

• To transport protons directly to oxygen

• To receive electrons from coenzyme NADH

• To oxidize coenzyme Q

Which molecule carries electrons from enzyme complex 1 to the next step in the electron transport chain?

• ATP

• Cytochrome c

• Oxygen

• Coenzyme Q

In the electron transport chain, what is the role of cytochrome c?

• To pump protons across the membrane

• To oxidize NADH

• To synthesize water

• To carry electrons to enzyme complex 4

What happens to oxygen in enzyme complex 4 during the electron transport chain?

• It is used to pump protons

• It is oxidized to form carbon dioxide

• It is converted into ATP

• It is reduced to form water

Which enzyme complex in the electron transport chain is responsible for oxidizing succinate?

• Enzyme complex 4

• Enzyme complex 3

• Enzyme complex 2

• Enzyme complex 1