AP BIOLOGY

Detailed explanation-1: -During this process, four protons are translocated from the mitochondrial matrix to the intermembrane space. As the electrons move through the complex an electron current is produced along the 180 Angstrom width of the complex within the membrane.

Detailed explanation-2: -Electrons from FADH2 bypass complex I and therefore a total number of 6 protons are pumped per each FADH2 oxidized. This creates a proton gradient across the inner mitochondrial membrane which acts as a temporary reservoir of much of the energy of electron transfer.

Detailed explanation-3: -This final complex in the electron transport chain accomplishes the final transfer of the electrons to oxygen and pumps two protons across the membrane. This makes a total of 10 protons across the membrane for one NADH into the electron transfer chain.

Detailed explanation-4: -NADH is oxidized back to NAD+. The electrons from NADH are transferred coenzyme Q, a non-polar electron carrier. The membrane must be fluid for it to diffuse from one complex to the next. Four protons are pumped from the inside (matrix) to the intermembrane space for each pair of electrons processed.

Detailed explanation-5: -What is the total number of FADH2 entering the electron transport chain? 2 FADH2, These are produced during the Krebs cycle. As high energy hydrogen electrons are passed down the electron transport chain, energy is released.