Multiple Choice
In a typical eukaryotic cell, where does the Krebs (citric acid) cycle primarily occur?
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11. Aerobic Respiration
Citric Acid Cycle
Multiple Choice
In a typical eukaryotic cell, where does the Krebs (citric acid) cycle primarily occur?
A
Nucleus
B
Mitochondrial matrix
C
Inner mitochondrial membrane
D
Cytosol
Verified step by step guidance1
Recall that the Krebs cycle, also known as the citric acid cycle, is a key metabolic pathway involved in cellular respiration, where acetyl-CoA is oxidized to produce energy carriers like NADH and FADH2.
Understand that in eukaryotic cells, cellular respiration is compartmentalized, with different stages occurring in specific locations within the cell.
Identify that the Krebs cycle takes place inside the mitochondria, but more specifically, it occurs in the mitochondrial matrix, which is the innermost compartment of the mitochondrion.
Differentiate this from other parts of the mitochondrion, such as the inner mitochondrial membrane, where the electron transport chain is located, and the cytosol, where glycolysis occurs.
Conclude that the correct location for the Krebs cycle is the mitochondrial matrix, as this is where the enzymes and substrates for the cycle are found.
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