In the electron transport system (ETS), which of the following are pumped into the intermembrane space, providing the concentration gradient essential for the generation of ATP?

Question

Quizplus · Accepted Answer

In the ETS, hydrogen ions (protons) are pumped from the matrix across the inner mitochondrial membrane and into the intermembrane space. This creates an electrochemical gradient that is essential for ATP synthesis through chemiosmosis. The other options, such as oxygen molecules, water molecules, ATP molecules, and cytochromes, are involved in the ETS but are not directly involved in the pumping of hydrogen ions into the intermembrane space.

In the Electron Transport System (ETS), Which of the Following