Multiple Choice
In a plant cell, what is the primary function of mitochondria?
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11. Aerobic Respiration
Mitochondria
Multiple Choice
In a mitochondrion, what is the mitochondrial matrix?
A
The folded portions of the inner mitochondrial membrane that house the electron transport chain complexes
B
The innermost compartment enclosed by the inner mitochondrial membrane that contains enzymes for the citric acid cycle, mitochondrial DNA, and ribosomes
C
The outermost membrane of the organelle that contains porin channels and encloses the entire mitochondrion
D
The space between the outer and inner mitochondrial membranes where protons accumulate during oxidative phosphorylation
Verified step by step guidance1
Understand the structure of the mitochondrion, which has two membranes: an outer membrane and an inner membrane.
Recognize that the inner membrane folds inward to form structures called cristae, which house the electron transport chain complexes.
Identify the mitochondrial matrix as the innermost compartment enclosed by the inner membrane, distinct from the cristae and the intermembrane space.
Recall that the mitochondrial matrix contains enzymes necessary for the citric acid cycle, as well as mitochondrial DNA and ribosomes.
Differentiate the matrix from the intermembrane space (between the inner and outer membranes) and the outer membrane itself, which contains porin channels.
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