Which organelle is known as the powerhouse of the cell?

• A. Mitochondria
• B. Nucleus
• C. Ribosomes
• D. Golgi Apparatus

Answer: (A)

The main idea is energy production. Mitochondria are the parts of the cell that generate most of its energy in the form of ATP through cellular respiration. They take in nutrients and, using oxygen, drive reactions like the Krebs cycle and the electron transport chain to produce ATP, the molecule cells use to power their activities. This is why they’re called the powerhouse: their activity supplies the energy cells need to function, move, divide, and respond to stress. For cells with high energy demands, you’ll find more mitochondria to meet those needs.

Other organelles have different roles: the nucleus stores the cell’s genetic material and directs activities; ribosomes build proteins by translating genetic information; the Golgi apparatus processes and ships proteins and lipids to their destinations.