Multiple Choice
Which of the following is not a complex of the electron transport chain?
345
views
11. Aerobic Respiration
Electron Transport
Multiple Choice
In eukaryotic cells, the electron transport chain (ETC) is located in which part of the mitochondrion?
A
Inner mitochondrial membrane (cristae)
B
Intermembrane space
C
Mitochondrial matrix
D
Outer mitochondrial membrane
Verified step by step guidance1
Recall the structure of the mitochondrion, which includes the outer mitochondrial membrane, the intermembrane space, the inner mitochondrial membrane (which has folds called cristae), and the mitochondrial matrix.
Understand that the electron transport chain (ETC) is a series of protein complexes and electron carriers involved in oxidative phosphorylation, which generates ATP.
Identify where the ETC complexes are embedded: they are located in the inner mitochondrial membrane, specifically within the cristae, to maximize surface area for ATP production.
Note that the intermembrane space is the area between the inner and outer membranes where protons are pumped to create a gradient, but it does not contain the ETC itself.
Recognize that the mitochondrial matrix contains enzymes for the Krebs cycle but not the ETC complexes, and the outer membrane serves as a barrier but is not involved in the ETC.
Related Videos
Related Practice
