Which of the following events takes place in the electron transport chain? a) The breakdown of glucose into six carbon dioxide molecules. b) The breakdown of NADH and FADH2 to carbon dioxide. c) Harnessing energy from high-energy electrons derived from glycolysis, pyruvate oxidation, and the Krebs cycle. d) Substrate-level phosphorylation.
Which of the following events takes place in the electron transport chain?
a) The breakdown of glucose into six carbon dioxide molecules.
b) The breakdown of NADH and FADH2 to carbon dioxide.
c) Harnessing energy from high-energy electrons derived from glycolysis, pyruvate oxidation, and the Krebs cycle.
d) Substrate-level phosphorylation.
Answered
The correct answer is:
c) Harnessing energy from high-energy electrons derived from glycolysis, pyruvate oxidation, and the Krebs cycle.
Explanation:
The electron transport chain (ETC), located in the inner mitochondrial membrane, uses high-energy electrons carried by NADH and FADH2_2 (produced in glycolysis, pyruvate oxidation, and the Krebs cycle). These electrons pass through a series of protein complexes, leading to the pumping of protons across the membrane and the generation of a proton gradient. The energy stored in this gradient drives ATP synthesis via oxidative phosphorylation.
BNO Team