Where does the Krebs cycle occur?

Where does the Krebs cycle occur?

• A. Cytoplasm
• B. Mitochondria
• C. Nucleus
• D. Golgi apparatus

Answer: (B)

The Krebs cycle takes place in the mitochondria, specifically in the mitochondrial matrix. In eukaryotic cells, glycolysis happens in the cytoplasm and pyruvate is transported into the mitochondria and converted to acetyl-CoA, which then enters the cycle. The enzymes of the cycle reside in the matrix and drive the oxidation of acetyl-CoA, releasing CO2 and producing NADH and FADH2 to fuel the electron transport chain. The other options aren’t correct because the cytoplasm is where glycolysis occurs, the nucleus houses genetic material, and the Golgi apparatus handles protein processing and trafficking.

The Krebs cycle takes place in the mitochondria, specifically in the mitochondrial matrix. In eukaryotic cells, glycolysis happens in the cytoplasm and pyruvate is transported into the mitochondria and converted to acetyl-CoA, which then enters the cycle. The enzymes of the cycle reside in the matrix and drive the oxidation of acetyl-CoA, releasing CO2 and producing NADH and FADH2 to fuel the electron transport chain. The other options aren’t correct because the cytoplasm is where glycolysis occurs, the nucleus houses genetic material, and the Golgi apparatus handles protein processing and trafficking.