1. The electrons involved in electron transport come from ______.
(A) glycolysis (B) the pyruvate dehydrogenase complex (C) the citric acid cycle (D) all three processes
2. When NADH and FADH2 transfer their electrons to the electron transport chain, they are ______.
(A) oxidized (B) epimerized (C) reduced (D) degraded
3. As electrons are transferred within complexes, ______ are transported out of the ______.
(A) HCO3- ; outer mitochondrial membrane (C) H+ ; inner mitochondrial membrane
(B) H+ ; outer mitochondrial membrane (D) ADP; inner mitochondrial membrane
4. NADH generated from glycolysis ______.
(A) is transported as intact NADH into the mitochondria for electron transport
(B) can be involved in the malate-aspartate shuttle so that reducing equivalents can be transported into the mitochondrion
(C) is already in the mitochondrion because all glycolysis occurs in the mitochondrion.
5. How many protons are transported out of the inner mitochondrial membrane when two electrons are transported from NADH to Coenzyme Q through Complex I?
(A) 0 (B) 1 (C) 2 (D) 4 (E) 6
6. How many protons are transported out of the inner mitochondrial membrane when two electrons are transported from FADH2 to Coenzyme Q through Complex II?
(A) 0 (B) 1 (C) 2 (D) 4 (E) 6
7. At the end of electron transport, 4 electrons are transported from cytochrome C one at a time to and through Complex IV. From these 4 electrons, (i) how many protons are pulled from the mitochondrial matrix and (ii) how many are transferred through to the intermembrane space?
(A) 2 & 2 (B) 4 & 2 (C) 4 & 4 (D) 8 & 4 (E) 8 & 8