Golgi apparatus mitochondrion ribosome nucleus
I gave my students this multiple choice question: An athlete is running a race. The athlete's body needs energy. Which organelle(s) in the athlete's cells supply the energy for cellular functions?

Only one answer is correct among these 4 choices:
- Golgi apparatus
- mitochondrion
- ribosome
- nucleus

Could you tell me which one is correct?

mitochondrion