Multiple Choice
What is the final electron acceptor in the electron transport chain during aerobic respiration?
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8. Respiration
Electron Transport Chain
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Where does the electron transport chain occur in eukaryotic cells?
A
In the outer mitochondrial membrane
B
In the mitochondrial matrix
C
In the inner mitochondrial membrane
D
In the cytoplasm
Verified step by step guidance1
Understand the structure of a mitochondrion: Mitochondria have two membranes, an outer membrane and an inner membrane, with an intermembrane space between them and a matrix inside the inner membrane.
Learn about the electron transport chain (ETC): The ETC is a series of protein complexes and other molecules that transfer electrons from electron donors to electron acceptors via redox reactions.
Identify the location of the ETC: In eukaryotic cells, the ETC is located in the inner mitochondrial membrane. This location is crucial for creating a proton gradient across the membrane.
Understand the role of the inner mitochondrial membrane: The inner membrane's structure, with its folds called cristae, increases the surface area for the ETC and ATP synthesis.
Recognize the importance of the proton gradient: The ETC pumps protons from the mitochondrial matrix to the intermembrane space, creating a gradient that drives ATP synthesis through ATP synthase.
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