Multiple Choice
In the citric acid (Krebs) cycle, why is it described as a "cycle"?
29
views
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 occur?
A
Nucleus
B
Inner mitochondrial membrane (cristae)
C
Cytosol
D
Mitochondrial matrix
Verified step by step guidance1
Recall the main compartments of a eukaryotic cell relevant to energy metabolism: the nucleus, cytosol, and mitochondria.
Understand that the Krebs cycle (citric acid cycle) is a key metabolic pathway involved in aerobic respiration, producing electron carriers for the electron transport chain.
Identify that the electron transport chain is located in the inner mitochondrial membrane (cristae), but the Krebs cycle itself occurs in a different mitochondrial compartment.
Recognize that the Krebs cycle takes place in the mitochondrial matrix, which is the innermost space of the mitochondrion enclosed by the inner membrane.
Conclude that the correct location for the Krebs cycle is the mitochondrial matrix, not the nucleus, cytosol, or inner mitochondrial membrane.
Related Videos
Related Practice
