Multiple Choice
Where does the Krebs cycle occur within a eukaryotic cell?
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8. Respiration
Krebs Cycle
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In which organelle does the Krebs cycle occur?
A
Endoplasmic Reticulum
B
Mitochondria
C
Nucleus
D
Chloroplast
Verified step by step guidance1
Begin by identifying the function of the Krebs cycle, which is a series of chemical reactions used by all aerobic organisms to generate energy through the oxidation of acetyl-CoA derived from carbohydrates, fats, and proteins into carbon dioxide and chemical energy in the form of ATP.
Understand that the Krebs cycle is a crucial part of cellular respiration, a process that occurs in the mitochondria of eukaryotic cells.
Recall that mitochondria are known as the powerhouse of the cell because they are the site of ATP (energy) production, and the Krebs cycle is a key component of this energy production process.
Consider the structure of mitochondria, which includes an outer membrane, an inner membrane, and a matrix. The Krebs cycle specifically takes place in the mitochondrial matrix.
Review the options given: Endoplasmic Reticulum, Nucleus, Chloroplast, and Mitochondria. Based on the understanding that the Krebs cycle occurs in the mitochondrial matrix, identify Mitochondria as the correct organelle where the Krebs cycle occurs.
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