Multiple Choice
In eukaryotic cells, where do the reactions of the tricarboxylic acid (TCA) cycle primarily take place?
22
views
Review 3: Pyruvate & Fatty Acid Oxidation, Citric Acid Cycle, & Glycogen Metabolism
Citric Acid Cycle 1
Multiple Choice
In eukaryotic cells, the Krebs (citric acid) cycle takes place primarily within the ________.
A
Cytosol
B
Nucleus
C
Inner mitochondrial membrane
D
Mitochondrial matrix
Verified step by step guidance1
Recall the cellular compartments involved in metabolism: cytosol, nucleus, mitochondrial matrix, and inner mitochondrial membrane.
Understand that the Krebs (citric acid) cycle is a series of enzymatic reactions that oxidize acetyl-CoA to produce energy carriers like NADH and FADH2.
Identify where these enzymes and substrates are located in eukaryotic cells; specifically, the enzymes of the Krebs cycle are found in the mitochondrial matrix.
Note that while the electron transport chain is embedded in the inner mitochondrial membrane, the Krebs cycle itself occurs in the matrix inside the mitochondria.
Conclude that the correct location for the Krebs cycle in eukaryotic cells is the mitochondrial matrix.
Related Videos
Related Practice
