Which organelle is the powerhouse that produces ATP by breaking down food?

• A. Lysosome
• B. Golgi Bodies
• C. Mitochondria
• D. Ribosome

Answer: (C)

ATP is the energy currency produced when cells extract energy from food through cellular respiration, which mainly happens in the mitochondria. The mitochondria host the Krebs cycle and the electron transport chain, where the energy from glucose is transferred to ATP. The inner membrane folds (cristae) provide lots of surface area for these reactions, making energy production efficient. While glycolysis in the cytoplasm starts breaking down glucose, it yields only a fraction of the total ATP compared to what mitochondria generate. Other organelles have different roles: lysosomes break down waste, the Golgi apparatus processes and ships proteins, and ribosomes build proteins. So the organelle most responsible for producing ATP by breaking down food is the mitochondrion.