Multiple Choice
Which of the following is not a complex of the electron transport chain?
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11. Aerobic Respiration
Electron Transport
Multiple Choice
Which process takes place in the inner membrane of mitochondria during electron transport?
A
Pyruvate oxidation (conversion of pyruvate to acetyl-CoA)
B
Oxidative phosphorylation via the electron transport chain and ATP synthase
C
The citric acid (Krebs) cycle
D
Glycolysis
Verified step by step guidance1
Identify the location of each process within the cell: Glycolysis occurs in the cytoplasm, pyruvate oxidation and the citric acid cycle occur in the mitochondrial matrix, and the electron transport chain (ETC) and ATP synthase activity occur in the inner mitochondrial membrane.
Understand that the electron transport chain is a series of protein complexes embedded in the inner mitochondrial membrane that transfer electrons from electron donors to oxygen, creating a proton gradient across the membrane.
Recognize that oxidative phosphorylation refers to the process where the energy from the electron transport chain is used by ATP synthase, also located in the inner membrane, to synthesize ATP from ADP and inorganic phosphate.
Recall that pyruvate oxidation (conversion of pyruvate to acetyl-CoA) and the citric acid cycle occur in the mitochondrial matrix, not in the inner membrane, and glycolysis occurs outside the mitochondria in the cytoplasm.
Conclude that the process taking place in the inner membrane of mitochondria during electron transport is oxidative phosphorylation, which includes the electron transport chain and ATP synthase activity.
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