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 eukaryotic cells, in which organelle does the Krebs (citric acid) cycle primarily occur?
A
Nucleus
B
Mitochondrion (specifically the mitochondrial matrix)
C
Golgi apparatus
D
Rough endoplasmic reticulum
Verified step by step guidance1
Recall that the Krebs cycle, also known as the citric acid cycle, is a key metabolic pathway that generates energy through the oxidation of acetyl-CoA derived from carbohydrates, fats, and proteins.
Understand that this cycle takes place inside a specific organelle in eukaryotic cells where enzymes and substrates are localized to facilitate the reactions.
Identify that the mitochondrion is the organelle responsible for energy production and contains a specialized compartment called the mitochondrial matrix.
Recognize that the mitochondrial matrix is the site where the enzymes of the Krebs cycle are located and where the cycle's chemical reactions occur.
Conclude that among the options given, the Krebs cycle primarily occurs in the mitochondrion, specifically within the mitochondrial matrix.
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