Respiration — practice question

Reduced ................................ donates hydrogen atoms to cytochrome carriers. Hydrogen atoms split into protons and electrons, and the electrons move from carrier to carrier. Energy from electron transfer is used to pump protons into the ................................, creating a proton gradient across the ................................ . Protons ................................ through the channel protein called ................................, into the matrix, producing ATP. The protons combine with electrons and ................................ atoms to form water.