Which of the following metabolic pathways occur(s) in the mitochondria?

• A. Citric Acid Cycle (Krebs Cycle)
• B. Glycolysis
• C. Fermentation
• D. Calvin Cycle

Answer: (A)

Verified step by step guidance

1. Identify the location within the cell where each metabolic pathway occurs. The mitochondria are known as the powerhouse of the cell, where certain metabolic processes take place.
2. Understand that the Citric Acid Cycle, also known as the Krebs Cycle, is a series of chemical reactions used by all aerobic organisms to release stored energy through the oxidation of acetyl-CoA derived from carbohydrates, fats, and proteins. This cycle occurs in the mitochondria.
3. Recognize that Glycolysis is the process of breaking down glucose into pyruvate, yielding energy in the form of ATP. This process occurs in the cytoplasm, not in the mitochondria.
4. Note that Fermentation is an anaerobic process that allows the production of ATP without oxygen, typically occurring in the cytoplasm. It is not associated with the mitochondria.
5. Understand that the Calvin Cycle is part of photosynthesis, occurring in the chloroplasts of plant cells, and is not related to the mitochondria or animal cells.