Multiple Choice
In human aerobic metabolism, which molecule is the primary waste product ultimately produced from complete oxidation of carbon fuels in the citric acid cycle and oxidative phosphorylation?
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Review 3: Pyruvate & Fatty Acid Oxidation, Citric Acid Cycle, & Glycogen Metabolism
Citric Acid Cycle 1
Multiple Choice
In eukaryotic cells, where does the Krebs (citric acid) cycle primarily occur?
A
Mitochondrial matrix
B
Cytosol
C
Inner mitochondrial membrane
D
Nucleus
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-rich molecules like NADH and FADH2.
Understand that in eukaryotic cells, different metabolic processes occur in specific cellular compartments to optimize efficiency and regulation.
Identify the location of the mitochondrion, which has multiple compartments: the outer membrane, the intermembrane space, the inner membrane, and the mitochondrial matrix.
Recognize that the Krebs cycle enzymes are located in the mitochondrial matrix, where the cycle takes place, while the electron transport chain is embedded in the inner mitochondrial membrane.
Conclude that the primary site of the Krebs cycle in eukaryotic cells is the mitochondrial matrix.
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